--- a/librtmp/hashswf.c
+++ b/librtmp/hashswf.c
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <time.h>
+#include <limits.h>
 
 #include "rtmp_sys.h"
 #include "log.h"