diff --git a/clang/lib/Basic/Targets/OSTargets.h b/clang/lib/Basic/Targets/OSTargets.h
index 4366c1149e4053..5f27c3469f861d 100644
--- a/clang/lib/Basic/Targets/OSTargets.h
+++ b/clang/lib/Basic/Targets/OSTargets.h
@@ -868,6 +868,7 @@ class LLVM_LIBRARY_VISIBILITY FuchsiaTargetInfo : public OSTargetInfo<Target> {
 public:
   FuchsiaTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
       : OSTargetInfo<Target>(Triple, Opts) {
+    this->WIntType = TargetInfo::UnsignedInt;
     this->MCountName = "__mcount";
     this->TheCXXABI.set(TargetCXXABI::Fuchsia);
   }