diff --git a/gcc/ginclude/proto.h b/gcc/ginclude/proto.h
new file mode 100644
index 0000000000000000000000000000000000000000..cc48915d842179bb33fb643db740bcce283a216a
--- /dev/null
+++ b/gcc/ginclude/proto.h
@@ -0,0 +1,4 @@
+/* This header file is to avoid trouble with semi-ANSI header files
+   on the Convex in system version 8.0.  */
+
+#define _PROTO(list) ()