diff --git a/llvm/include/llvm/IR/Constants.h b/llvm/include/llvm/IR/Constants.h
index 25d8f6afc1bdc..c2c2cac649f14 100644
--- a/llvm/include/llvm/IR/Constants.h
+++ b/llvm/include/llvm/IR/Constants.h
@@ -41,11 +41,6 @@
 
 namespace llvm {
 
-class ArrayType;
-class IntegerType;
-class PointerType;
-class StructType;
-class VectorType;
 template <class ConstantClass> struct ConstantAggrKeyType;
 
 /// Base class for constants with no operands.