diff --git a/libs/apr/include/arch/win32/apr_arch_networkio.h b/libs/apr/include/arch/win32/apr_arch_networkio.h
index d4e434d0c1..bb58dde224 100644
--- a/libs/apr/include/arch/win32/apr_arch_networkio.h
+++ b/libs/apr/include/arch/win32/apr_arch_networkio.h
@@ -20,6 +20,9 @@
 #include "apr_network_io.h"
 #include "apr_general.h"
 #include "apr_poll.h"
+#ifdef _MSC_VER
+#undef MCAST_JOIN_SOURCE_GROUP
+#endif
 
 typedef struct sock_userdata_t sock_userdata_t;
 struct sock_userdata_t {