diff --git a/testtokenize.cpp b/testtokenize.cpp
index e6592b7ee..aa5ce468e 100644
--- a/testtokenize.cpp
+++ b/testtokenize.cpp
@@ -21,9 +21,10 @@
 // the code for a known configuration, it generates the code for each configuration.
 
 
+#include <cstring>
 #include "testsuite.h"
 #define UNIT_TESTING        // Get access to "private" data in Tokenizer
-#include "tokenize.h"
+#include "tokenize.h"
 
 extern std::ostringstream errout;
 class TestTokenizer : public TestFixture