diff --git a/gcc/fixinc.svr4 b/gcc/fixinc.svr4
index 582c6fbd2f3..cb1517d81e9 100755
--- a/gcc/fixinc.svr4
+++ b/gcc/fixinc.svr4
@@ -188,6 +188,7 @@ while [ $# != 0 ]; do
 	  s/__STDC__[ 	][ 	]*==[ 	][ 	]*0/!defined (__STRICT_ANSI__)/g
 	  s/__STDC__[ 	][ 	]*==[ 	][ 	]*1/defined (__STRICT_ANSI__)/g
 	  s/__STDC__[ 	][ 	]*!=[ 	][ 	]*0/defined (__STRICT_ANSI__)/g
+	  s/__STDC__[ 	][ 	]*!=[ 	][ 	]*1/!defined (__STRICT_ANSI__)/g
 	  s/__STDC__ - 0 == 0/!defined (__STRICT_ANSI__)/g
 	  /^typedef[ 	][ 	]*[unsigned 	]*long[ 	][ 	]*[u_]*longlong_t;/s/long/long long/
 	' $2/$file > $2/$file.sed