1 files changed, 1 insertions, 1 deletions
diff --git a/insns.def b/insns.def
index 348f956ed6..4e45d5e532 100644
--- a/insns.def
+++ b/insns.def
@@ -775,7 +775,7 @@ defined
 (VALUE val)
 {
     VALUE klass;
-    char *expr_type = 0;
+    const char *expr_type = 0;
     val = Qnil;
 
     switch (type) {