diff --git a/lib/enums/GraphStreamCommand.ts b/lib/enums/GraphStreamCommand.ts
index c1fef6a..a2b5920 100644
--- a/lib/enums/GraphStreamCommand.ts
+++ b/lib/enums/GraphStreamCommand.ts
@@ -22,7 +22,7 @@ function translate_command (cmd: GraphStreamCommand|''): string {
     ce:  'create edge',
     '':  'start'
   };
-  return translations[cmd];
+  return `'${translations[cmd]}'`;
 }
 
 export { GraphStreamCommand, translate_command };