diff --git a/src/eval.c b/src/eval.c
index 93b840e..3f8ce5f 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1570,7 +1570,7 @@
 				if ((flags & GLV_READ_ONLY) == 0)
 				{
 				    semsg(_(e_member_is_not_writable_str),
-					    om->ocm_name);
+					    om->ocm_name, cl->class_name);
 				    return NULL;
 				}
 				break;