diff --git a/include/llvm/Argument.h b/include/llvm/Argument.h
index c69caab8314..ce81a94a637 100644
--- a/include/llvm/Argument.h
+++ b/include/llvm/Argument.h
@@ -16,6 +16,7 @@
 
 #include "llvm/Value.h"
 #include "llvm/ParameterAttributes.h"
+#include "llvm/ADT/ilist_node.h"
 
 namespace llvm {