diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index d9e796e66c7..b1e8774a6b4 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -24,6 +24,7 @@
 #include "llvm/Support/MutexGuard.h"
 #include "llvm/System/DynamicLibrary.h"
 #include "llvm/Target/TargetData.h"
+#include <math.h>
 using namespace llvm;
 
 STATISTIC(NumInitBytes, "Number of bytes of global vars initialized");