1 files changed, 2 insertions, 2 deletions
diff --git a/src/kernel.c b/src/kernel.c
index 225f7fa54..759dc42b7 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -654,13 +654,13 @@ mrb_class_instance_method_list(mrb_state *mrb, mrb_bool recur, struct RClass* kl
 {
   khint_t i;
   mrb_value ary;
-  mrb_bool prepended;
+  mrb_bool prepended = FALSE;
   struct RClass* oldklass;
   khash_t(st)* set = kh_init(st, mrb);
 
   if (!recur && (klass->flags & MRB_FLAG_IS_PREPENDED)) {
     MRB_CLASS_ORIGIN(klass);
-    prepended = 1;
+    prepended = TRUE;
   }
 
   oldklass = 0;