diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index d18459e..41afc6c 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -53,6 +53,7 @@
 #endif
 #include <jpeglib.h>
 #endif
+#include <strings.h>
 #include <stdarg.h>
 #include <time.h>