diff --git a/ChangeLog b/ChangeLog
index a542807515..1e05338476 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul  2 03:20:00 2014  Charlie Somerville  <charliesome@ruby-lang.org>
+
+	* node.c (dump_node): handle nd_value == (NODE *)-1 to mean this
+	  keyword argument is required
+
 Wed Jul  2 02:57:27 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm.c (rb_vm_env_local_variables): returns array of local
diff --git a/node.c b/node.c
index 15d27dfa22..e251d85721 100644
--- a/node.c
+++ b/node.c
@@ -300,7 +300,12 @@ dump_node(VALUE buf, VALUE indent, int comment, NODE *node)
       asgn:
 	F_ID(nd_vid, "variable");
 	LAST_NODE;
-	F_NODE(nd_value, "rvalue");
+	if (node->nd_value == (NODE *)-1) {
+	    F_MSG(nd_value, "rvalue", "(required keyword argument)");
+	}
+	else {
+	    F_NODE(nd_value, "rvalue");
+	}
 	break;
 
       case NODE_GASGN: