diff --git a/Server/commands/join.js b/Server/commands/join.js
index 1cb8183..02e0b62 100644
--- a/Server/commands/join.js
+++ b/Server/commands/join.js
@@ -114,7 +114,7 @@ module.exports = {
         for (const nodeObject of nodeObjects) {            
             log.DEBUG("Node object: ", nodeObject);
             for (const presetName in nodeObject.nearbySystems) {
-				if (typeof presetName === "number") presetsAvailable.push(nodeObject.nearbySystems[presetName]);
+				if (!isNaN(presetName)) presetsAvailable.push(nodeObject.nearbySystems[presetName]);
 				presetsAvailable.push(presetName)
 			}
         }