diff --git a/src/platform/posix/posix_udp.c b/src/platform/posix/posix_udp.c
index 4ef4c68ce..a7eb71440 100644
--- a/src/platform/posix/posix_udp.c
+++ b/src/platform/posix/posix_udp.c
@@ -12,6 +12,7 @@
 #include "nng/nng.h"
 #include "platform/posix/posix_impl.h"
 #include <sys/errno.h>
+#include <sys/types.h>
 
 #ifdef NNG_PLATFORM_POSIX
 #include "platform/posix/posix_pollq.h"