diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 0d880ed74a8..33a40508511 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -76,6 +76,7 @@
 #include "llvm/Support/ConstantRange.h"
 #include "llvm/Support/InstIterator.h"
 #include "Support/Statistic.h"
+#include <cmath>
 using namespace llvm;
 
 namespace {
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 29132c06809..76a22a44dd0 100644
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -15,6 +15,7 @@
 #include "llvm/Transforms/Utils/Local.h"
 #include "llvm/Constants.h"
 #include "llvm/Instructions.h"
+#include <cmath>
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//