diff --git a/sqlcipher.xcodeproj/project.pbxproj b/sqlcipher.xcodeproj/project.pbxproj
index 3e4722f..061a0eb 100644
--- a/sqlcipher.xcodeproj/project.pbxproj
+++ b/sqlcipher.xcodeproj/project.pbxproj
@@ -228,31 +228,40 @@
 		1DEB91F008733DB70010E9CD /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				"ARCHS[sdk=iphoneos*]" = (
+					armv6,
+					armv7,
+				);
+				"ARCHS[sdk=macosx*]" = "$(ARCHS_STANDARD_32_64_BIT)";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				ONLY_ACTIVE_ARCH = NO;
+				ONLY_ACTIVE_ARCH = YES;
 				PREBINDING = NO;
+				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphonesimulator macosx iphoneos";
-				VALID_ARCHS = "i386 ppc ppc64 ppc7400 ppc970 x86_64 armv6 armv7";
 			};
 			name = Debug;
 		};
 		1DEB91F108733DB70010E9CD /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				"ARCHS[sdk=iphoneos*]" = (
+					armv6,
+					armv7,
+				);
+				"ARCHS[sdk=macosx*]" = "$(ARCHS_STANDARD_32_64_BIT)";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				ONLY_ACTIVE_ARCH = NO;
 				PREBINDING = NO;
+				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphonesimulator macosx iphoneos";
-				VALID_ARCHS = "i386 ppc ppc64 ppc7400 ppc970 x86_64 armv6 armv7";
 			};
 			name = Release;
 		};