diff --git a/polly/include/polly/CodeGen/BlockGenerators.h b/polly/include/polly/CodeGen/BlockGenerators.h
index 8619cd9a2ede..1b5835ed58e8 100644
--- a/polly/include/polly/CodeGen/BlockGenerators.h
+++ b/polly/include/polly/CodeGen/BlockGenerators.h
@@ -129,7 +129,7 @@ public:
   ///
   /// @returns The alloca for @p Access or a replacement value taken from
   ///          GlobalMap.
-  Value *getOrCreateAlloca(MemoryAccess &Access);
+  Value *getOrCreateAlloca(const MemoryAccess &Access);
 
   /// @brief Return the alloca for @p Array
   ///
diff --git a/polly/lib/CodeGen/BlockGenerators.cpp b/polly/lib/CodeGen/BlockGenerators.cpp
index d25aaf8e3fee..33611e7a9efe 100644
--- a/polly/lib/CodeGen/BlockGenerators.cpp
+++ b/polly/lib/CodeGen/BlockGenerators.cpp
@@ -344,7 +344,7 @@ Value *BlockGenerator::getOrCreateAlloca(Value *ScalarBase,
   return Addr;
 }
 
-Value *BlockGenerator::getOrCreateAlloca(MemoryAccess &Access) {
+Value *BlockGenerator::getOrCreateAlloca(const MemoryAccess &Access) {
   if (Access.isPHIKind())
     return getOrCreatePHIAlloca(Access.getBaseAddr());
   else