diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 04c17f0..66cb41a 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -39,6 +39,11 @@
 #define DO_PG
 #endif
 
+#ifdef _NEXT_SOURCE
+#define mode_t int
+#define NO_UNAME
+#endif
+
 #include <signal.h>
 #include <string.h>
 #include <setjmp.h>