diff --git a/llvm/include/llvm/IR/GlobalVariable.h b/llvm/include/llvm/IR/GlobalVariable.h
index bcaf8e91432ba..5108d5eec292e 100644
--- a/llvm/include/llvm/IR/GlobalVariable.h
+++ b/llvm/include/llvm/IR/GlobalVariable.h
@@ -146,8 +146,8 @@ class GlobalVariable : public GlobalObject, public ilist_node<GlobalVariable> {
     assert(hasInitializer() && "GV doesn't have initializer!");
     return static_cast<Constant*>(Op<0>().get());
   }
-  /// setInitializer - Sets the initializer for this global variable, removing
-  /// any existing initializer if InitVal==NULL.  If this GV has type T*, the
+  /// setInitializer - Sets the initializer for this global variable to
+  /// InitVal, which must be non-null.  If this GV has type T*, the
   /// initializer must have type T.
   void setInitializer(Constant *InitVal);