diff --git a/mongoose.c b/mongoose.c
index d5ee15ec..d504b19a 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -65,6 +65,7 @@
 #include <io.h>
 #else // _WIN32_WCE
 #include <winsock2.h>
+#include <ws2tcpip.h>
 #define NO_CGI // WinCE has no pipes
 
 typedef long off_t;