diff --git a/src/cli/OutputGTFSCommand.ts b/src/cli/OutputGTFSCommand.ts
index 140f036b..500cff33 100644
--- a/src/cli/OutputGTFSCommand.ts
+++ b/src/cli/OutputGTFSCommand.ts
@@ -68,7 +68,7 @@ export class OutputGTFSCommand implements CLICommand {
    */
   private async copy(results: object[] | Promise<object[]>, filename: string): Promise<void> {
     const rows = await results;
-    const output = this.output.open(`${this.baseDir}/filename`);
+    const output = this.output.open(`${this.baseDir}/${filename}`);
 
     console.log("Writing " + filename);
     rows.forEach(row => output.write(row));