diff --git a/kitty/conf/definition.py b/kitty/conf/definition.py
index 2e6135ea2..60565879d 100644
--- a/kitty/conf/definition.py
+++ b/kitty/conf/definition.py
@@ -149,7 +149,11 @@ def wrapped_block(lines):
         )
     for block, indent_size in iter_blocks(lines):
         if indent_size > 0:
-            yield from iter(block)
+            for line in block:
+                if not line:
+                    yield line
+                else:
+                    yield '#: ' + line
         else:
             for line in wrapper.wrap('\n'.join(block)):
                 yield line