diff --git a/tasks/main.yml b/tasks/main.yml
index 91e3eb7..f55f8ff 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -2,11 +2,21 @@
   apt_repository:
     filename: backports
     repo: "deb http://ftp.de.debian.org/debian {{ansible_distribution_release}}-backports main contrib non-free"
+- name: remove incomplete backports apt list
+  apt_repository:
+    filename: backports
+    repo: "deb http://ftp.de.debian.org/debian {{ansible_distribution_release}}-backports main"
+    state: absent
 
 - name: install backports sources apt list
   apt_repository:
     filename: backports
     repo: "deb-src http://ftp.de.debian.org/debian {{ansible_distribution_release}}-backports main contrib non-free"
+- name: remove incomplete backports sources apt list
+  apt_repository:
+    filename: backports
+    repo: "deb-src http://ftp.de.debian.org/debian {{ansible_distribution_release}}-backports main"
+    state: absent
 
 - name: remove obsolete apt lists
   file: path=/etc/apt/sources.list.d/{{ item }}-backports.list state=absent