diff --git a/tests/benchmarks/bench.h b/tests/benchmarks/bench.h
index 64d769d571..128ebf10dd 100644
--- a/tests/benchmarks/bench.h
+++ b/tests/benchmarks/bench.h
@@ -11,6 +11,7 @@
 #define _WX_TESTS_BENCHMARKS_BENCH_H_
 
 #include "wx/cpp.h"
+#include "wx/crt.h"
 #include "wx/defs.h"
 
 namespace Bench