diff --git a/.travis.yml b/.travis.yml
index 5810f0157..16fb7586f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ addons:
     - libgl1-mesa-dev
     - libglu1-mesa-dev
     - libgc-dev
+    - libgtk2.0-dev
 
 before_install:
   - "export DISPLAY=:99.0"