diff --git a/lib/Sema/SemaCXXCast.cpp b/lib/Sema/SemaCXXCast.cpp
index 5f1a355..40086d6 100644
--- a/lib/Sema/SemaCXXCast.cpp
+++ b/lib/Sema/SemaCXXCast.cpp
@@ -642,6 +642,7 @@
     }
   } else if (tcr == TC_Success && Self.getLangOptions().ObjCAutoRefCount) {
     Expr *Exp = SrcExpr.get();
+    // Note that Exp does not change with CCK_OtherCast cat type
     Self.CheckObjCARCConversion(OpRange, DestType,
                                 Exp, Sema::CCK_OtherCast);
   }
@@ -707,6 +708,7 @@
       Self.CheckCastAlign(SrcExpr.get(), DestType, OpRange);
     if (Self.getLangOptions().ObjCAutoRefCount) {
       Expr *Exp = SrcExpr.get();
+      // Note that Exp does not change with CCK_OtherCast cat type
       Self.CheckObjCARCConversion(OpRange, DestType,
                                   Exp, Sema::CCK_OtherCast);
     }