diff --git a/ChangeLog b/ChangeLog
index f0f3f9e132..a258582d68 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Aug 14 18:50:57 2015  Eric Wong  <e@80x24.org>
+
+	* method.h (METHOD_ENTRY_VISI_SET): cast visi to int
+	  (METHOD_ENTRY_FLAGS_SET): ditto
+
 Fri Aug 14 18:43:11 2015  Eric Wong  <e@80x24.org>
 
 	* process.c (close_unless_reserved): add extra check
diff --git a/method.h b/method.h
index e46ba551a2..71dc2c088b 100644
--- a/method.h
+++ b/method.h
@@ -68,7 +68,7 @@ typedef struct rb_callable_method_entry_struct { /* same fields with rb_method_e
 static inline void
 METHOD_ENTRY_VISI_SET(rb_method_entry_t *me, rb_method_visibility_t visi)
 {
-    VM_ASSERT(visi >= 0 && visi <= 3);
+    VM_ASSERT((int)visi >= 0 && visi <= 3);
     me->flags = (me->flags & ~(IMEMO_FL_USER0 | IMEMO_FL_USER1)) | (visi << IMEMO_FL_USHIFT+0);
 }
 static inline void
@@ -86,7 +86,7 @@ METHOD_ENTRY_SAFE_SET(rb_method_entry_t *me, unsigned int safe)
 static inline void
 METHOD_ENTRY_FLAGS_SET(rb_method_entry_t *me, rb_method_visibility_t visi, unsigned int basic, unsigned int safe)
 {
-    VM_ASSERT(visi >= 0 && visi <= 3);
+    VM_ASSERT((int)visi >= 0 && visi <= 3);
     VM_ASSERT(basic <= 1);
     VM_ASSERT(safe <= 1);
     me->flags =