diff --git a/lib/plugins/filter/before_post_render/backtick_code_block.js b/lib/plugins/filter/before_post_render/backtick_code_block.js
index 55dc3a1fbd..8120b39f4f 100644
--- a/lib/plugins/filter/before_post_render/backtick_code_block.js
+++ b/lib/plugins/filter/before_post_render/backtick_code_block.js
@@ -50,6 +50,7 @@ function backtickCodeBlock(data) {
       }
     }
 
+    // PR #3765
     const endOfStart = start.split('\n').pop();
     if (endOfStart && endOfStart.includes('>')) {
       const depth = endOfStart.split('>').length - 1;