diff --git a/llvm/include/llvm/Analysis/ConstantFolding.h b/llvm/include/llvm/Analysis/ConstantFolding.h
index 68aa1948ab88e..0ccc782ad6f59 100644
--- a/llvm/include/llvm/Analysis/ConstantFolding.h
+++ b/llvm/include/llvm/Analysis/ConstantFolding.h
@@ -25,7 +25,6 @@ template <typename T> class ArrayRef;
 class CallBase;
 class Constant;
 class ConstantExpr;
-class ConstantVector;
 class DataLayout;
 class Function;
 class GlobalValue;