diff --git a/changelog.md b/changelog.md
index ce028034b..6a8ae608c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,7 @@
 
-[v0.31.25](https://github.com/nextcloud/nextcloudpi/commit/6ab01cd) (2017-10-29) letsencrypt: remove workaround. fixed upstream
+[v0.31.26](https://github.com/nextcloud/nextcloudpi/commit/f9c5319) (2017-10-30) build: check ncp-launcher existence for old images
+
+[v0.31.25](https://github.com/nextcloud/nextcloudpi/commit/4d283f9) (2017-10-29) letsencrypt: remove workaround. fixed upstream
 
 [v0.31.24](https://github.com/nextcloud/nextcloudpi/commit/53943b4) (2017-10-27) nc-forward-ports: more info in output
 
diff --git a/update.sh b/update.sh
index 659d27236..1d0a8ed3a 100755
--- a/update.sh
+++ b/update.sh
@@ -196,7 +196,8 @@ EOF
   chmod +x /usr/local/bin/ncp-notify-unattended-upgrade
 
   # log adjustment for wizard
-  grep -q sleep /home/www/ncp-launcher.sh || echo "sleep 0.5 && echo \"\" > /run/ncp.log" >> /home/www/ncp-launcher.sh
+  test -f /home/www/ncp-launcher.sh && \
+    grep -q sleep /home/www/ncp-launcher.sh || echo "sleep 0.5 && echo \"\" > /run/ncp.log" >> /home/www/ncp-launcher.sh
 }
 
 # License