1 files changed, 3 insertions, 3 deletions
diff --git a/gc.c b/gc.c
index c172a0841d..7c8324cf62 100644
--- a/gc.c
+++ b/gc.c
@@ -814,6 +814,8 @@ gc_mark_children(ptr, lev)
 	  case NODE_OP_ASGN_OR:
 	  case NODE_OP_ASGN_AND:
 	  case NODE_MODULE:
+	  case NODE_ALIAS:
+	  case NODE_VALIAS:
 	    gc_mark((VALUE)obj->as.node.u1.node, lev);
 	    /* fall through */
 	  case NODE_METHOD:	/* 2 */
@@ -828,6 +830,7 @@ gc_mark_children(ptr, lev)
 	  case NODE_COLON3:
 	  case NODE_OPT_N:
 	  case NODE_EVSTR:
+	  case NODE_UNDEF:
 	    ptr = (VALUE)obj->as.node.u2.node;
 	    goto again;
 
@@ -867,11 +870,8 @@ gc_mark_children(ptr, lev)
 	  case NODE_CVAR:
 	  case NODE_NTH_REF:
 	  case NODE_BACK_REF:
-	  case NODE_ALIAS:
-	  case NODE_VALIAS:
 	  case NODE_REDO:
 	  case NODE_RETRY:
-	  case NODE_UNDEF:
 	  case NODE_SELF:
 	  case NODE_NIL:
 	  case NODE_TRUE: