1 files changed, 1 insertions, 1 deletions
diff --git a/net/file_server.ts b/net/file_server.ts
index aaaec64d5..91afa2d57 100755
--- a/net/file_server.ts
+++ b/net/file_server.ts
@@ -177,7 +177,7 @@ function guessContentType(filename: string): string {
     return contentType;
   }
 
-  return extensionsMap[''];
+  return extensionsMap[""];
 }
 
 async function serveFile(req: ServerRequest, filename: string) {