diff --git a/aider/coders/wholefile_func_coder.py b/aider/coders/wholefile_func_coder.py
index 8a0cd8f41..ecec9a440 100644
--- a/aider/coders/wholefile_func_coder.py
+++ b/aider/coders/wholefile_func_coder.py
@@ -78,8 +78,6 @@ class WholeFileFunctionCoder(Coder):
             if not content:
                 continue
 
-            res += path + ":\n"
-
             this_final = (i < len(files) - 1) or final
             res += self.live_diffs(path, content, this_final)
 
@@ -98,6 +96,7 @@ class WholeFileFunctionCoder(Coder):
             orig_lines,
             lines,
             final,
+            fname=fname,
         ).splitlines()
 
         return "\n".join(show_diff)
diff --git a/aider/diffs.py b/aider/diffs.py
index dd6297d1b..7be231ce3 100644
--- a/aider/diffs.py
+++ b/aider/diffs.py
@@ -33,7 +33,7 @@ def create_progress_bar(percentage):
     return bar
 
 
-def diff_partial_update(lines_orig, lines_updated, final=False):
+def diff_partial_update(lines_orig, lines_updated, final=False, fname=None):
     """
     Given only the first part of an updated file, show the diff while
     ignoring the block of "deleted" lines that are past the end of the
@@ -72,6 +72,8 @@ def diff_partial_update(lines_orig, lines_updated, final=False):
         diff += "\n"
 
     show = "```diff\n"
+    if fname:
+        show += f"@@ {fname}\n"
     if not final:
         show += bar