diff --git a/black.py b/black.py
index 9fe1dc4deca..cf20c9ecc6c 100644
--- a/black.py
+++ b/black.py
@@ -126,7 +126,7 @@ class FileMode(Flag):
     AUTO_DETECT = 0
     PYTHON36 = 1
     PYI = 2
-    SINGLE_QUOTE = 4
+    SINGLE_QUOTE = 32
 
 
 @click.command()