diff --git a/libs/openzap/src/include/zap_types.h b/libs/openzap/src/include/zap_types.h
index 9e189a138a..2e7d5447f6 100644
--- a/libs/openzap/src/include/zap_types.h
+++ b/libs/openzap/src/include/zap_types.h
@@ -38,6 +38,7 @@
 #include <windows.h>
 typedef HANDLE zap_socket_t;
 typedef unsigned __int32 uint32_t;
+typedef __int32 int32_t;
 #else
 #include <stdint.h>
 typedef int zap_socket_t;