diff --git a/src/commandlineflags.cc b/src/commandlineflags.cc
index aeb27ec9..3e9a37a7 100644
--- a/src/commandlineflags.cc
+++ b/src/commandlineflags.cc
@@ -14,10 +14,10 @@
 
 #include "commandlineflags.h"
 
+#include <cstdlib>
 #include <cstring>
 #include <iostream>
 #include <limits>
-#include <cstdlib>
 
 namespace benchmark {
 // Parses 'str' for a 32-bit signed integer.  If successful, writes
diff --git a/test/benchmark_test.cc b/test/benchmark_test.cc
index 093a935d..2d268ce4 100644
--- a/test/benchmark_test.cc
+++ b/test/benchmark_test.cc
@@ -4,6 +4,7 @@
 #include <math.h>
 #include <stdint.h>
 
+#include <cstdlib>
 #include <iostream>
 #include <limits>
 #include <list>
@@ -13,7 +14,6 @@
 #include <sstream>
 #include <string>
 #include <vector>
-#include <cstdlib>
 
 #if defined(__GNUC__)
 # define BENCHMARK_NOINLINE __attribute__((noinline))