diff --git a/pisi/build.py b/pisi/build.py
index 3e8db8c5..31f161ee 100644
--- a/pisi/build.py
+++ b/pisi/build.py
@@ -301,7 +301,7 @@ class PisiBuild:
         found = []
         for root, dirs, files in os.walk(config.options.output_dir):
             for fn in files:
-                fn = fn.decode("utf-8")
+                fn = fn.decode('utf-8')
                 if fn.startswith(package_name + '-') and \
                     fn.endswith(const.package_prefix):
                     old_package_fn = os.path.join(root, fn)