diff --git a/.travis.yml b/.travis.yml
index 1adc8e03..544f7534 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,11 @@ env:
 
 script: admin/build.sh
 
+addons:
+  apt:
+    packages:
+      - openjdk-6-jdk
+
 jdk:
   - openjdk6
   - oraclejdk8