diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index da998bfcb..6aa541b5d 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -245,8 +245,8 @@ class Coder:
 
     # fences are obfuscated so aider can modify this file!
     fences = [
-        ("``" + "`", "``" + "`"),
         wrap_fence("source"),
+        ("``" + "`", "``" + "`"),
         wrap_fence("code"),
         wrap_fence("pre"),
         wrap_fence("codeblock"),