diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 6139f9d..2625da2 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -42,10 +42,7 @@
 static void getDarwinDefines(std::vector<char> &Defs) {
   Define(Defs, "__APPLE__");
   Define(Defs, "__MACH__");
-  Define(Defs, "__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__=1050");
-  
-  if (0)  // darwin_pascal_strings
-    Define(Defs, "__PASCAL_STRINGS__");
+  Define(Defs, "__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__", "1050");
 }
 
 static void getDragonFlyDefines(std::vector<char> &Defs) {
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 3f477c2..458eca6 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -414,6 +414,10 @@
   if (PP.getLangOptions().ObjC2)
     DefineBuiltinMacro(Buf, "OBJC_NEW_PROPERTIES");
 
+  if (PP.getLangOptions().PascalStrings)
+    DefineBuiltinMacro(Buf, "__PASCAL_STRINGS__");
+
+  
   // Add __builtin_va_list typedef.
   {
     const char *VAList = PP.getTargetInfo().getVAListDeclaration();