diff --git a/clang/lib/CodeGen/CGObjC.cpp b/clang/lib/CodeGen/CGObjC.cpp
index 03fc0ec7ff54e..f3a948cf13f9c 100644
--- a/clang/lib/CodeGen/CGObjC.cpp
+++ b/clang/lib/CodeGen/CGObjC.cpp
@@ -899,9 +899,13 @@ namespace {
                          const ObjCPropertyImplDecl *propImpl);
 
   private:
+    LLVM_PREFERRED_TYPE(StrategyKind)
     unsigned Kind : 8;
+    LLVM_PREFERRED_TYPE(bool)
     unsigned IsAtomic : 1;
+    LLVM_PREFERRED_TYPE(bool)
     unsigned IsCopy : 1;
+    LLVM_PREFERRED_TYPE(bool)
     unsigned HasStrong : 1;
 
     CharUnits IvarSize;