diff --git a/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js b/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
index 0bdf7e3..38d8a2b 100644
--- a/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
+++ b/LocalFlowPlugins/video/transcode2PassX265/1.0.0/index.js
@@ -253,8 +253,8 @@ const plugin = async (args) => {
     spawnArgs: [
       '-y',
       '-i', inputFile,
-      '-map_metadata -1',
-      '-map_chapters -1',
+      '-map_metadata', '-1',
+      '-map_chapters', '-1',
       ...videoArgs,
       '-x265-params', `no-slow-firstpass=1:pass=1:${x265ParamsBase}`,
       '-an', '-sn',
diff --git a/tests/quick-logic-test.js b/tests/quick-logic-test.js
index 8acfd2c..183bcfa 100644
--- a/tests/quick-logic-test.js
+++ b/tests/quick-logic-test.js
@@ -200,6 +200,8 @@ const AUDIO_INPUTS = {
   ok(transcodeCode.includes('bitrateKbps < copyHevcBelowKbps'), 'HEVC copy requires bitrate strictly below the limit');
   ok(transcodeCode.includes("copyHevcBelowKbps || '3000'"), 'HEVC copy limit defaults to 3000 kbps');
   ok(transcodeCode.includes("'-c:v', 'copy'"), 'compatible HEVC video uses stream copy');
+  ok(!transcodeCode.includes("'-map_metadata -1'"), 'pass 1 separates -map_metadata from its value');
+  ok(!transcodeCode.includes("'-map_chapters -1'"), 'pass 1 separates -map_chapters from its value');
 
   // ── Summary ───────────────────────────────────────────────────────────────
   console.log(`\n${'='.repeat(55)}`);