diff --git a/scripts/mkquran.py b/scripts/mkquran.py
index 788c5984a7..1e5da10158 100644
--- a/scripts/mkquran.py
+++ b/scripts/mkquran.py
@@ -4,7 +4,7 @@
 from fontTools.ttLib import TTFont
 from fontTools import subset
 
-LAYER = re.compile('.*\.l\d+$')
+LAYER = re.compile(r'.*\.l\d+$')
 
 def rename(font):
     names = set()