diff --git a/docs/GettingStarted.md b/docs/GettingStarted.md
index 92dab552..4ee70830 100644
--- a/docs/GettingStarted.md
+++ b/docs/GettingStarted.md
@@ -104,7 +104,6 @@ Given a set of options that you would typically pass to a server, plus a set of
 
 * `dev (boolean)`: optional boolean indicating if the bundle has to be built in development mode. Implies things like setting `__DEV__` to `true`. Defaults to `false`.
 * `entryFile (string)`: entry point for bundling the file.
-* `generateSourceMaps (boolean)`: whether source Maps should be generated or not. Defaults to `false`.
 * `inlineSourceMap (boolean)`: indicates whether the source map is provided inlined with the bundle (as a bas64 encoded URL), or in a separate file. When provided as a separate file, the URL where it will be found can be customized with `sourceMapUrl`. Defaults to `false`.
 * `minify (boolean)`: whether code should be minified. Defaults to `false`.
 * `platform (string)`: if a list of platforms is provided, a particular platform can be passed.
diff --git a/packages/metro/src/DeltaBundler/DeltaCalculator.js b/packages/metro/src/DeltaBundler/DeltaCalculator.js
index 2fbf2e66..8154d079 100644
--- a/packages/metro/src/DeltaBundler/DeltaCalculator.js
+++ b/packages/metro/src/DeltaBundler/DeltaCalculator.js
@@ -161,7 +161,6 @@ class DeltaCalculator extends EventEmitter {
     const transformOptionsForBlacklist = {
       enableBabelRCLookup,
       dev: this._options.dev,
-      generateSourceMaps: this._options.generateSourceMaps,
       hot: this._options.hot,
       inlineRequires: false,
       minify: this._options.minify,
diff --git a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
index 3234072b..1db27239 100644
--- a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
@@ -43,7 +43,6 @@ describe('DeltaCalculator', () => {
     entryFile: 'bundle',
     entryModuleOnly: false,
     excludeSource: false,
-    generateSourceMaps: false,
     hot: true,
     inlineSourceMap: true,
     isolateModuleIDs: false,
@@ -301,7 +300,6 @@ describe('DeltaCalculator', () => {
       expect(await deltaCalculator.getTransformerOptions()).toEqual({
         dev: true,
         enableBabelRCLookup: false,
-        generateSourceMaps: false,
         hot: true,
         inlineRequires: false,
         minify: false,
@@ -320,7 +318,6 @@ describe('DeltaCalculator', () => {
       expect(await deltaCalculator.getTransformerOptions()).toEqual({
         dev: true,
         enableBabelRCLookup: false,
-        generateSourceMaps: false,
         hot: true,
         inlineRequires: true,
         minify: false,
@@ -339,7 +336,6 @@ describe('DeltaCalculator', () => {
       expect(await deltaCalculator.getTransformerOptions()).toEqual({
         dev: true,
         enableBabelRCLookup: false,
-        generateSourceMaps: false,
         hot: true,
         inlineRequires: {blacklist: {'/bar': true, '/baz': true}},
         minify: false,
diff --git a/packages/metro/src/HmrServer/getBundlingOptionsForHmr.js b/packages/metro/src/HmrServer/getBundlingOptionsForHmr.js
index 14d34a6b..dbbad627 100644
--- a/packages/metro/src/HmrServer/getBundlingOptionsForHmr.js
+++ b/packages/metro/src/HmrServer/getBundlingOptionsForHmr.js
@@ -39,7 +39,6 @@ module.exports = function getBundlingOptionsForHmr(
     dev: true,
     entryModuleOnly: false,
     excludeSource: false,
-    generateSourceMaps: false,
     inlineSourceMap: false,
     isolateModuleIDs: false,
     onProgress: null,
diff --git a/packages/metro/src/JSTransformer/worker/index.js b/packages/metro/src/JSTransformer/worker/index.js
index b7e02a65..f38d3814 100644
--- a/packages/metro/src/JSTransformer/worker/index.js
+++ b/packages/metro/src/JSTransformer/worker/index.js
@@ -62,7 +62,6 @@ export type Transformer<ExtraOptions: {} = {}> = {
 export type TransformOptionsStrict = {|
   +enableBabelRCLookup: boolean,
   +dev: boolean,
-  +generateSourceMaps: boolean,
   +hot: boolean,
   +inlineRequires: boolean,
   +minify: boolean,
@@ -73,7 +72,6 @@ export type TransformOptionsStrict = {|
 export type TransformOptions = {
   +enableBabelRCLookup?: boolean,
   +dev?: boolean,
-  +generateSourceMaps?: boolean,
   +hot?: boolean,
   +inlineRequires: boolean,
   +minify: boolean,
diff --git a/packages/metro/src/ModuleGraph/worker/__tests__/transform-module-test.js b/packages/metro/src/ModuleGraph/worker/__tests__/transform-module-test.js
index 0ece169f..64b38488 100644
--- a/packages/metro/src/ModuleGraph/worker/__tests__/transform-module-test.js
+++ b/packages/metro/src/ModuleGraph/worker/__tests__/transform-module-test.js
@@ -87,7 +87,6 @@ describe('transforming JS modules:', () => {
 
   const defaults = {
     dev: false,
-    generateSourceMaps: true,
     hot: false,
     inlineRequires: false,
     minify: false,
diff --git a/packages/metro/src/ModuleGraph/worker/transform-module.js b/packages/metro/src/ModuleGraph/worker/transform-module.js
index 40a2d522..3738cdd0 100644
--- a/packages/metro/src/ModuleGraph/worker/transform-module.js
+++ b/packages/metro/src/ModuleGraph/worker/transform-module.js
@@ -49,7 +49,6 @@ export type TransformOptions<ExtraOptions> = {|
 const NODE_MODULES = path.sep + 'node_modules' + path.sep;
 const defaultTransformOptions = {
   dev: false,
-  generateSourceMaps: true,
   hot: false,
   inlineRequires: false,
   minify: false,
diff --git a/packages/metro/src/Server/__tests__/Server-test.js b/packages/metro/src/Server/__tests__/Server-test.js
index 6c467984..606ca036 100644
--- a/packages/metro/src/Server/__tests__/Server-test.js
+++ b/packages/metro/src/Server/__tests__/Server-test.js
@@ -190,7 +190,6 @@ describe('processRequest', () => {
             entryFile: 'index.ios.js',
             entryModuleOnly: false,
             excludeSource: false,
-            generateSourceMaps: false,
             hot: true,
             inlineSourceMap: false,
             isolateModuleIDs: false,
@@ -222,7 +221,6 @@ describe('processRequest', () => {
             entryFile: 'index.js',
             entryModuleOnly: false,
             excludeSource: false,
-            generateSourceMaps: false,
             hot: true,
             inlineSourceMap: false,
             isolateModuleIDs: false,
@@ -254,7 +252,6 @@ describe('processRequest', () => {
         entryFile: 'index.js',
         entryModuleOnly: false,
         excludeSource: false,
-        generateSourceMaps: false,
         hot: true,
         inlineSourceMap: false,
         isolateModuleIDs: false,
@@ -431,7 +428,6 @@ describe('processRequest', () => {
               entryFile: 'foo file',
               entryModuleOnly: false,
               excludeSource: false,
-              generateSourceMaps: false,
               hot: false,
               inlineSourceMap: false,
               isolateModuleIDs: false,
diff --git a/packages/metro/src/Server/index.js b/packages/metro/src/Server/index.js
index 853dd9f0..aabff411 100644
--- a/packages/metro/src/Server/index.js
+++ b/packages/metro/src/Server/index.js
@@ -250,7 +250,6 @@ class Server {
     +dev: boolean,
     +platform: string,
     +minify: boolean,
-    +generateSourceMaps: boolean,
   }): Promise<Array<string>> {
     const bundleOptions = {
       ...Server.DEFAULT_BUNDLE_OPTIONS,
@@ -839,7 +838,6 @@ class Server {
         'entryModuleOnly',
         false,
       ),
-      generateSourceMaps: false,
       assetPlugins,
       onProgress: null,
       unbundle: false,
@@ -868,7 +866,6 @@ class Server {
     dev: true,
     entryModuleOnly: false,
     excludeSource: false,
-    generateSourceMaps: false,
     hot: false,
     inlineSourceMap: false,
     isolateModuleIDs: false,
diff --git a/packages/metro/src/index.js b/packages/metro/src/index.js
index 288e452d..eb330fb8 100644
--- a/packages/metro/src/index.js
+++ b/packages/metro/src/index.js
@@ -237,7 +237,6 @@ exports.runBuild = async (options: RunBuildOptions) => {
   const requestOptions: RequestOptions = {
     dev: options.dev,
     entryFile: options.entry,
-    generateSourceMaps: options.sourceMap || !!options.sourceMapUrl,
     inlineSourceMap: options.sourceMap && !!options.sourceMapUrl,
     minify: options.optimize || false,
     platform: options.platform || `web`,
diff --git a/packages/metro/src/legacy.js b/packages/metro/src/legacy.js
index c5cb7363..7f8421c3 100644
--- a/packages/metro/src/legacy.js
+++ b/packages/metro/src/legacy.js
@@ -43,7 +43,6 @@ type Options = {|
 type PublicBundleOptions = {
   +dev?: boolean,
   +entryFile: string,
-  +generateSourceMaps?: boolean,
   +inlineSourceMap?: boolean,
   +minify?: boolean,
   +platform?: string,
@@ -72,11 +71,6 @@ function assertPublicBundleOptions(bo: mixed): PublicBundleOptions {
     typeof entryFile === 'string',
     'bundle options must contain a string field `entryFile`',
   );
-  invariant(
-    bo.generateSourceMaps === undefined ||
-      typeof bo.generateSourceMaps === 'boolean',
-    'bundle options field `generateSourceMaps` must be a boolean',
-  );
   invariant(
     bo.inlineSourceMap === undefined || typeof bo.inlineSourceMap === 'boolean',
     'bundle options field `inlineSourceMap` must be a boolean',
@@ -125,7 +119,6 @@ exports.getOrderedDependencyPaths = async function(
     +dev: boolean,
     +platform: string,
     +minify: boolean,
-    +generateSourceMaps: boolean,
   },
 ): Promise<Array<string>> {
   var server = createNonPersistentServer(options);
diff --git a/packages/metro/src/lib/GlobalTransformCache.js b/packages/metro/src/lib/GlobalTransformCache.js
index 6c2377da..a83aa082 100644
--- a/packages/metro/src/lib/GlobalTransformCache.js
+++ b/packages/metro/src/lib/GlobalTransformCache.js
@@ -440,7 +440,6 @@ class OptionsHasher {
   ): crypto$Hash {
     const {
       enableBabelRCLookup,
-      generateSourceMaps,
       dev,
       hot,
       inlineRequires,
@@ -461,7 +460,6 @@ class OptionsHasher {
     hash.update(
       new Buffer([
         +dev |
-          (+generateSourceMaps << 1) |
           (+hot << 2) |
           (+inlineRequires << 3) |
           (+enableBabelRCLookup << 4) |
diff --git a/packages/metro/src/lib/__tests__/GlobalTransformCache-test.js b/packages/metro/src/lib/__tests__/GlobalTransformCache-test.js
index 2a5d962d..3ae608ae 100644
--- a/packages/metro/src/lib/__tests__/GlobalTransformCache-test.js
+++ b/packages/metro/src/lib/__tests__/GlobalTransformCache-test.js
@@ -45,7 +45,6 @@ describe('GlobalTransformCache', () => {
       storeResults: null,
     });
     const transformOptions = {
-      generateSourceMaps: false,
       dev: false,
       hot: false,
       inlineRequires: false,
diff --git a/packages/metro/src/shared/types.flow.js b/packages/metro/src/shared/types.flow.js
index 2b219e5f..c389cb37 100644
--- a/packages/metro/src/shared/types.flow.js
+++ b/packages/metro/src/shared/types.flow.js
@@ -34,7 +34,6 @@ export type BundleOptions = {
   entryFile: string,
   +entryModuleOnly: boolean,
   +excludeSource: boolean,
-  +generateSourceMaps: boolean,
   +hot: boolean,
   +inlineSourceMap: boolean,
   +isolateModuleIDs: boolean,
@@ -109,7 +108,6 @@ export type OutputOptions = {
 
 export type RequestOptions = {|
   entryFile: string,
-  generateSourceMaps?: boolean,
   inlineSourceMap?: boolean,
   sourceMapUrl?: string,
   dev?: boolean,