diff --git a/llvm/include/llvm/Analysis/MemorySSA.h b/llvm/include/llvm/Analysis/MemorySSA.h
index e73af5f89ed60a..a1511aa3ad3436 100644
--- a/llvm/include/llvm/Analysis/MemorySSA.h
+++ b/llvm/include/llvm/Analysis/MemorySSA.h
@@ -857,7 +857,6 @@ class MemorySSA {
   template <typename AliasAnalysisType>
   MemoryUseOrDef *createNewAccess(Instruction *, AliasAnalysisType *,
                                   const MemoryUseOrDef *Template = nullptr);
-  MemoryAccess *findDominatingDef(BasicBlock *, enum InsertionPlace);
   void placePHINodes(const SmallPtrSetImpl<BasicBlock *> &);
   MemoryAccess *renameBlock(BasicBlock *, MemoryAccess *, bool);
   void renameSuccessorPhis(BasicBlock *, MemoryAccess *, bool);