diff --git a/make.h b/make.h
index 2074fe9d..5ff702c3 100644
--- a/make.h
+++ b/make.h
@@ -67,7 +67,7 @@ extern int errno;
 #endif
 
 /* Some systems define _POSIX_VERSION but are not really POSIX.1.  */
-#if (defined (butterfly) || defined (__arm) \
+#if (defined (butterfly) || defined (__arm) || \
      (defined (__mips) && defined (_SYSTYPE_SVR3)) || \
      (defined (sequent) && defined (i386)))
 #undef POSIX