diff --git a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
index 2148316532de..dc501b564eea 100644
--- a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
+++ b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
@@ -798,24 +798,28 @@ static bool rewriteToNumberLiteral(const ObjCMessageExpr *Msg,
   case NSAPI::NSNumberWithUnsignedInt:
   case NSAPI::NSNumberWithUnsignedInteger:
     CallIsUnsigned = true;
+    LLVM_FALLTHROUGH;
   case NSAPI::NSNumberWithInt:
   case NSAPI::NSNumberWithInteger:
     break;
 
   case NSAPI::NSNumberWithUnsignedLong:
     CallIsUnsigned = true;
+    LLVM_FALLTHROUGH;
   case NSAPI::NSNumberWithLong:
     CallIsLong = true;
     break;
 
   case NSAPI::NSNumberWithUnsignedLongLong:
     CallIsUnsigned = true;
+    LLVM_FALLTHROUGH;
   case NSAPI::NSNumberWithLongLong:
     CallIsLongLong = true;
     break;
 
   case NSAPI::NSNumberWithDouble:
     CallIsDouble = true;
+    LLVM_FALLTHROUGH;
   case NSAPI::NSNumberWithFloat:
     CallIsFloating = true;
     break;