diff --git a/.travis.yml b/.travis.yml
index da288e827..b876cf04d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,10 @@ script:
 
 after_success:
   - set -e;
+  - if [ -z "$DOCKER_PASS" ] ; then
+    echo "This is a build triggered by an external PR. Skipping docker push.";
+    exit 0;
+    fi;
   - docker login -u $DOCKER_USER -p $DOCKER_PASS;
   - ./scripts/push.sh
 notifications: