diff --git a/include/llvm/Transforms/Utils/MemorySSA.h b/include/llvm/Transforms/Utils/MemorySSA.h
index d7c6b267910..7a014dda92f 100644
--- a/include/llvm/Transforms/Utils/MemorySSA.h
+++ b/include/llvm/Transforms/Utils/MemorySSA.h
@@ -783,7 +783,7 @@ public:
   /// will return that MemoryDef, whereas the above would return the clobber
   /// starting from the use side of  the memory def.
   virtual MemoryAccess *getClobberingMemoryAccess(MemoryAccess *,
-                                                  MemoryLocation &) = 0;
+                                                  const MemoryLocation &) = 0;
 
   /// \brief Given a memory access, invalidate anything this walker knows about
   /// that access.
@@ -809,7 +809,7 @@ public:
   using MemorySSAWalker::getClobberingMemoryAccess;
   MemoryAccess *getClobberingMemoryAccess(MemoryAccess *) override;
   MemoryAccess *getClobberingMemoryAccess(MemoryAccess *,
-                                          MemoryLocation &) override;
+                                          const MemoryLocation &) override;
 };
 
 using MemoryAccessPair = std::pair<MemoryAccess *, MemoryLocation>;
diff --git a/lib/Transforms/Utils/MemorySSA.cpp b/lib/Transforms/Utils/MemorySSA.cpp
index 5eb0453317c..c71b72ab2eb 100644
--- a/lib/Transforms/Utils/MemorySSA.cpp
+++ b/lib/Transforms/Utils/MemorySSA.cpp
@@ -1097,7 +1097,7 @@ public:
   using MemorySSAWalker::getClobberingMemoryAccess;
   MemoryAccess *getClobberingMemoryAccess(MemoryAccess *) override;
   MemoryAccess *getClobberingMemoryAccess(MemoryAccess *,
-                                          MemoryLocation &) override;
+                                          const MemoryLocation &) override;
   void invalidateInfo(MemoryAccess *) override;
 
   /// Whether we call resetClobberWalker() after each time we *actually* walk to
@@ -2163,7 +2163,7 @@ MemoryAccess *MemorySSA::CachingWalker::getClobberingMemoryAccess(
 }
 
 MemoryAccess *MemorySSA::CachingWalker::getClobberingMemoryAccess(
-    MemoryAccess *StartingAccess, MemoryLocation &Loc) {
+    MemoryAccess *StartingAccess, const MemoryLocation &Loc) {
   if (isa<MemoryPhi>(StartingAccess))
     return StartingAccess;
 
@@ -2266,7 +2266,7 @@ DoNothingMemorySSAWalker::getClobberingMemoryAccess(MemoryAccess *MA) {
 }
 
 MemoryAccess *DoNothingMemorySSAWalker::getClobberingMemoryAccess(
-    MemoryAccess *StartingAccess, MemoryLocation &) {
+    MemoryAccess *StartingAccess, const MemoryLocation &) {
   if (auto *Use = dyn_cast<MemoryUseOrDef>(StartingAccess))
     return Use->getDefiningAccess();
   return StartingAccess;