diff --git a/llvm/include/llvm/IR/DerivedTypes.h b/llvm/include/llvm/IR/DerivedTypes.h
--- a/llvm/include/llvm/IR/DerivedTypes.h
+++ b/llvm/include/llvm/IR/DerivedTypes.h
@@ -434,7 +434,7 @@
   /// This static method is the primary way to construct an VectorType.
   static VectorType *get(Type *ElementType, ElementCount EC);
   static VectorType *get(Type *ElementType, unsigned NumElements,
-                         bool Scalable = false) {
+                         bool Scalable) {
     return VectorType::get(ElementType, {NumElements, Scalable});
   }