diff --git a/debian/changelog b/debian/changelog
index f305820..eb81083 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -19,6 +19,9 @@ ubuntu-dev-tools (0.178) UNRELEASED; urgency=medium
     + Limit bug description length to 50k chars to support Launchpad's limits.
       LP: #1193941
 
+  [ Dimitri John Ledkov ]
+  * pullpkg.py: fix --mirror option parsing.
+
  -- Mattia Rizzolo <mattia@debian.org>  Tue, 22 Dec 2020 17:50:52 +0100
 
 ubuntu-dev-tools (0.177) unstable; urgency=medium
diff --git a/ubuntutools/pullpkg.py b/ubuntutools/pullpkg.py
index 5e2a22b..5748f04 100644
--- a/ubuntutools/pullpkg.py
+++ b/ubuntutools/pullpkg.py
@@ -344,7 +344,7 @@ class PullPkg(object):
 
         mirrors = []
         if options['mirror']:
-            mirrors.append(options['mirror'])
+            mirrors.extend(options['mirror'])
         if pull == PULL_DDEBS:
             config = UDTConfig(options['no_conf'])
             ddebs_mirror = config.get_value(distro.upper() + '_DDEBS_MIRROR')