diff --git a/bench/bench-string.cpp b/bench/bench-string.cpp
index 5d0567a1..3bd1ef84 100644
--- a/bench/bench-string.cpp
+++ b/bench/bench-string.cpp
@@ -39,6 +39,7 @@
 
 #include <stdio.h>
 #include <time.h>
+#include <limits.h>
 
 #ifdef BENCH_CAN_USE_MSTARLIB
 #define NDEBUG