diff --git a/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h b/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
index b2b4507bbc74..f827ffd3e676 100644
--- a/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
+++ b/llvm/include/llvm/Transforms/Utils/PromoteMemToReg.h
@@ -19,7 +19,6 @@ namespace llvm {
 template <typename T> class ArrayRef;
 class AllocaInst;
 class DominatorTree;
-class AliasSetTracker;
 class AssumptionCache;
 
 /// Return true if this alloca is legal for promotion.