diff --git a/assets/scripts/create_fontmap.py b/assets/scripts/create_fontmap.py
index ec8e88d..bc9b59d 100644
--- a/assets/scripts/create_fontmap.py
+++ b/assets/scripts/create_fontmap.py
@@ -26,8 +26,8 @@
 ROOT = os.path.dirname(__file__)
 
 def main():
-    create_fontmap_16('font-tiles-16.png', 'FONT16.dat', 10)
-    create_fontmap_8('font-tiles-8.png', 'FONT8.dat', 6)
+    create_fontmap_16('font-tiles-16.png', 'FONT16.DAT', 10)
+    create_fontmap_8('font-tiles-8.png', 'FONT8.DAT', 6)
 
 def create_fontmap_16(infile, outfile, rows):
     """