diff --git a/src/litegraph.js b/src/litegraph.js
index 3f0afa0a9..693d2413e 100644
--- a/src/litegraph.js
+++ b/src/litegraph.js
@@ -1286,11 +1286,11 @@
                 var node = column[j];
                 node.pos[0] = (layout == LiteGraph.VERTICAL_LAYOUT) ? y : x;
                 node.pos[1] = (layout == LiteGraph.VERTICAL_LAYOUT) ? x : y;
-                max_size_index = (layout == LiteGraph.VERTICAL_LAYOUT) ? 1 : 0;
+                var max_size_index = (layout == LiteGraph.VERTICAL_LAYOUT) ? 1 : 0;
                 if (node.size[max_size_index] > max_size) {
                     max_size = node.size[max_size_index];
                 }
-                node_size_index = (layout == LiteGraph.VERTICAL_LAYOUT) ? 0 : 1;
+                var node_size_index = (layout == LiteGraph.VERTICAL_LAYOUT) ? 0 : 1;
                 y += node.size[node_size_index] + margin + LiteGraph.NODE_TITLE_HEIGHT;
             }
             x += max_size + margin;