diff --git a/Tests/CTestTestMemcheck/memtester.cxx.in b/Tests/CTestTestMemcheck/memtester.cxx.in
index 4609fa3418..da6f5a4599 100644
--- a/Tests/CTestTestMemcheck/memtester.cxx.in
+++ b/Tests/CTestTestMemcheck/memtester.cxx.in
@@ -1,5 +1,5 @@
-#include <string>
 #include <cmSystemTools.h>
+#include <string>
 
 #define RETVAL @_retval@