1 files changed, 1 insertions, 1 deletions
diff --git a/re.c b/re.c
index 019e4de09f..366387b6ac 100644
--- a/re.c
+++ b/re.c
@@ -1327,7 +1327,7 @@ rb_reg_options(re)
 
 static VALUE
 rb_reg_become(copy, re)
-    VALUE re;
+    VALUE copy, re;
 {
     if (copy == re) return copy;
     rb_check_frozen(copy);