1 files changed, 1 insertions, 1 deletions
diff --git a/re.c b/re.c
index b7c74e0d0e..d8ef7b21a9 100644
--- a/re.c
+++ b/re.c
@@ -3153,7 +3153,7 @@ rb_reg_s_last_match(int argc, VALUE *argv)
 
 static void
 re_warn(const char* s) {
-    rb_warn("%s" ,s);
+    rb_warn("%s", s);
 }
 
 /*