diff --git a/lib/libwebsockets.h b/lib/libwebsockets.h
index c24f09d6d..4a0a7ec21 100644
--- a/lib/libwebsockets.h
+++ b/lib/libwebsockets.h
@@ -39,6 +39,8 @@ extern "C" {
 
 #define strcasecmp stricmp
 
+typedef int ssize_t;
+
 #ifdef LWS_DLL
 #ifdef LWS_INTERNAL
 #define LWS_EXTERN extern __declspec(dllexport)