diff --git a/tools/sort_map.py b/tools/sort_map.py
index ead33cea0..dedeb3fd1 100644
--- a/tools/sort_map.py
+++ b/tools/sort_map.py
@@ -26,6 +26,9 @@ def total_bank_size(type):
 	return sizes[type]
 
 def sorted_mapfile(input):
+	# analogous to ";File generated by rgblink"
+	yield ';File generated by sort_map.py\n'
+	
 	# ex: OAM:
 	unused_rx = re.compile(r'^([A-Z]+):$')
 	# ex: ROM Bank #1: