diff --git a/.travis.yml b/.travis.yml
index 7df93e2..5cbb578 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ before_install:
   - sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
   - sudo add-apt-repository --yes ppa:libreoffice/libreoffice-4-2
   - sudo apt-get update -qq
-  - sudo apt-get install -qq cmake libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev g++-4.8 cppcheck doxygen
+  - sudo apt-get install -qq cmake libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev libsdl2-mixer-dev g++-4.8 cppcheck doxygen
   - sudo sed -i -e 's|friend class hash|friend struct hash|' /usr/include/c++/4.8/bits/stl_bvector.h
   - if [ "$CXX" = "g++" ]; then export CXX="g++-4.8" CC="gcc-4.8"; fi
 script: