Index: include/clang/Basic/AlignedAllocation.h
===================================================================
--- include/clang/Basic/AlignedAllocation.h
+++ include/clang/Basic/AlignedAllocation.h
@@ -22,18 +22,18 @@
 
 namespace clang {
 
-inline VersionTuple alignedAllocMinVersion(llvm::Triple::OSType OS) {
+inline llvm::VersionTuple alignedAllocMinVersion(llvm::Triple::OSType OS) {
   switch (OS) {
   default:
     break;
   case llvm::Triple::Darwin:
   case llvm::Triple::MacOSX: // Earliest supporting version is 10.13.
-    return VersionTuple(10U, 13U);
+    return llvm::VersionTuple(10U, 13U);
   case llvm::Triple::IOS:
   case llvm::Triple::TvOS: // Earliest supporting version is 11.0.0.
-    return VersionTuple(11U);
+    return llvm::VersionTuple(11U);
   case llvm::Triple::WatchOS: // Earliest supporting version is 4.0.0.
-    return VersionTuple(4U);
+    return llvm::VersionTuple(4U);
   }
 
   llvm_unreachable("Unexpected OS");