diff --git a/Atom.xcodeproj/project.pbxproj b/Atom.xcodeproj/project.pbxproj
index 139e5252f..1340c765b 100644
--- a/Atom.xcodeproj/project.pbxproj
+++ b/Atom.xcodeproj/project.pbxproj
@@ -346,6 +346,7 @@
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
 				GCC_PRECOMPILE_PREFIX_HEADER = NO;
+				GCC_PREPROCESSOR_DEFINITIONS = "PROJECT_DIR=\"@\\\"$PROJECT_DIR\\\"\"";
 				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;