diff --git a/bin/9c b/bin/9c
index 6f203054..ccfbe7e9 100755
--- a/bin/9c
+++ b/bin/9c
@@ -23,7 +23,7 @@ usegcc()
 		-fno-omit-frame-pointer \
 		-fsigned-char \
 		-fcommon \
-		-std=c17 \
+		-std=c11 \
 	"
 	# want to put -fno-optimize-sibling-calls here but
 	# that option only works with gcc3+ it seems