diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 37e8917..c1b9d57 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -528,6 +528,10 @@
     Builder.defineMacro("__PIC__", Twine(PICLevel));
     Builder.defineMacro("__pic__", Twine(PICLevel));
   }
+  if (unsigned PIELevel = LangOpts.PIELevel) {
+    Builder.defineMacro("__PIE__", Twine(PIELevel));
+    Builder.defineMacro("__pie__", Twine(PIELevel));
+  }
 
   // Macros to control C99 numerics and <float.h>
   Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));