diff --git a/React/Base/RCTAssert.h b/React/Base/RCTAssert.h
index 977720377..cb55d58ac 100644
--- a/React/Base/RCTAssert.h
+++ b/React/Base/RCTAssert.h
@@ -55,6 +55,11 @@ RCT_EXTERN NSString *const RCTErrorDomain;
  */
 RCT_EXTERN NSString *const RCTJSStackTraceKey;
 
+/**
+ * Raw JS Stack trace string provided as part of an NSError's userInfo
+ */
+RCT_EXTERN NSString *const RCTJSRawStackTraceKey;
+
 /**
  * Name of fatal exceptions generated by RCTFatal
  */
diff --git a/React/Base/RCTAssert.m b/React/Base/RCTAssert.m
index d31f85b3f..345dae021 100644
--- a/React/Base/RCTAssert.m
+++ b/React/Base/RCTAssert.m
@@ -12,6 +12,7 @@
 
 NSString *const RCTErrorDomain = @"RCTErrorDomain";
 NSString *const RCTJSStackTraceKey = @"RCTJSStackTraceKey";
+NSString *const RCTJSRawStackTraceKey = @"RCTJSRawStackTraceKey";
 NSString *const RCTFatalExceptionName = @"RCTFatalException";
 
 static NSString *const RCTAssertFunctionStack = @"RCTAssertFunctionStack";
diff --git a/React/Modules/RCTRedBox.h b/React/Modules/RCTRedBox.h
index 7703f5f8b..c586091a7 100644
--- a/React/Modules/RCTRedBox.h
+++ b/React/Modules/RCTRedBox.h
@@ -17,6 +17,7 @@
 - (void)showError:(NSError *)error;
 - (void)showErrorMessage:(NSString *)message;
 - (void)showErrorMessage:(NSString *)message withDetails:(NSString *)details;
+- (void)showErrorMessage:(NSString *)message withRawStack:(NSString *)rawStack;
 - (void)showErrorMessage:(NSString *)message withStack:(NSArray<NSDictionary *> *)stack;
 - (void)updateErrorMessage:(NSString *)message withStack:(NSArray<NSDictionary *> *)stack;
 
diff --git a/React/Modules/RCTRedBox.m b/React/Modules/RCTRedBox.m
index b01ca7857..436417f9c 100644
--- a/React/Modules/RCTRedBox.m
+++ b/React/Modules/RCTRedBox.m
@@ -339,6 +339,13 @@ RCT_EXPORT_MODULE()
   [self showErrorMessage:combinedMessage];
 }
 
+- (void)showErrorMessage:(NSString *)message withRawStack:(NSString *)rawStack
+{
+  // TODO #11638796: convert rawStack into something useful
+  message = [NSString stringWithFormat:@"%@\n\n%@", message, rawStack];
+  [self showErrorMessage:message withStack:nil isUpdate:NO];
+}
+
 - (void)showErrorMessage:(NSString *)message withStack:(NSArray<NSDictionary *> *)stack
 {
   [self showErrorMessage:message withStack:stack isUpdate:NO];