1 files changed, 1 insertions, 0 deletions
diff --git a/variable.c b/variable.c
index 18cd0c14ee..255854d8f0 100644
--- a/variable.c
+++ b/variable.c
@@ -1458,6 +1458,7 @@ original_module(c)
 
 static void
 cvar_override_check(id, a)
+    ID id;
     VALUE a;
 {
     VALUE base = original_module(a);