diff --git a/clang.xcodeproj/project.pbxproj b/clang.xcodeproj/project.pbxproj
index be3483e..6ef61af 100644
--- a/clang.xcodeproj/project.pbxproj
+++ b/clang.xcodeproj/project.pbxproj
@@ -1320,7 +1320,10 @@
 				GCC_ENABLE_SYMBOL_SEPARATION = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
-				GCC_PREPROCESSOR_DEFINITIONS = "__STDC_LIMIT_MACROS=1";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					__STDC_CONSTANT_MACROS,
+					"__STDC_LIMIT_MACROS=1",
+				);
 				GCC_STRICT_ALIASING = YES;
 				GCC_THREADSAFE_STATICS = NO;
 				GCC_USE_GCC3_PFE_SUPPORT = NO;
@@ -1356,7 +1359,10 @@
 				GCC_ENABLE_PASCAL_STRINGS = NO;
 				GCC_ENABLE_SYMBOL_SEPARATION = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = "__STDC_LIMIT_MACROS=1";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					__STDC_CONSTANT_MACROS,
+					"__STDC_LIMIT_MACROS=1",
+				);
 				GCC_STRICT_ALIASING = YES;
 				GCC_THREADSAFE_STATICS = NO;
 				GCC_USE_GCC3_PFE_SUPPORT = NO;