diff --git a/adafruit_shell.py b/adafruit_shell.py
index 3d9884d..b2c35a1 100644
--- a/adafruit_shell.py
+++ b/adafruit_shell.py
@@ -502,7 +502,7 @@ class Shell:
                         return raspbian
         return None
 
-    def prompt_reboot(self, default ="y", **kwargs):
+    def prompt_reboot(self, default="y", **kwargs):
         """Prompt the user for a reboot"""
         if not self.prompt("REBOOT NOW?", default=default, **kwargs):
             print("Exiting without reboot.")