libre2c: added missing include.

diff --git a/lib/bench.cc b/lib/bench.cc
index 076a16d3ef1246ec63128245c9fbca01ed36c9b5..d5525ca41c491dc143f783244ea9a9d2ab1c81bf 100644 (file)
--- a/lib/bench.cc
+++ b/lib/bench.cc
@@ -14,6 +14,7 @@
 #include <string.h>
 #include <time.h>
 #include <vector>
+#include <string>
 
 #ifdef HAVE_RE2_RE2_H
 #include "re2/re2.h"