1 files changed, 1 insertions, 2 deletions
diff --git a/class.c b/class.c
index 2e8710194d..6b3b6623f1 100644
--- a/class.c
+++ b/class.c
@@ -1830,8 +1830,7 @@ rb_keyword_error_new(const char *error, VALUE keys)
 	rb_str_cat_cstr(error_message, ": ");
 	while (1) {
             const VALUE k = RARRAY_AREF(keys, i);
-	    Check_Type(k, T_SYMBOL); /* wrong hash is given to rb_get_kwargs */
-	    rb_str_append(error_message, rb_sym2str(k));
+	    rb_str_append(error_message, rb_inspect(k));
 	    if (++i >= len) break;
 	    rb_str_cat_cstr(error_message, ", ");
 	}