diff --git a/llvm/lib/Analysis/AliasAnalysis.cpp b/llvm/lib/Analysis/AliasAnalysis.cpp
index 1cb5cc8..d44653e 100644
--- a/llvm/lib/Analysis/AliasAnalysis.cpp
+++ b/llvm/lib/Analysis/AliasAnalysis.cpp
@@ -429,7 +429,7 @@
 /// if known, or a conservative value otherwise.
 ///
 uint64_t AliasAnalysis::getTypeStoreSize(Type *Ty) {
-  return DL ? DL->getTypeStoreSize(Ty) : UnknownSize;
+  return DL ? DL->getTypeStoreSize(Ty) : MemoryLocation::UnknownSize;
 }
 
 /// canBasicBlockModify - Return true if it is possible for execution of the