diff --git a/libvirtnbdbackup/output/target.py b/libvirtnbdbackup/output/target.py
index 59b3ccaa..4896542c 100644
--- a/libvirtnbdbackup/output/target.py
+++ b/libvirtnbdbackup/output/target.py
@@ -107,7 +107,7 @@ def seek(self, tgt: int, whence: int = 0):
 
         def checksum(self):
             """Return computed checksum"""
-            cur =  self.chksum
+            cur = self.chksum
             self.chksum = 1
             return cur