diff --git a/.travis.yml b/.travis.yml
index 796febd..05b8b69 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,8 +56,9 @@ before_install:
       wget https://github.com/Itseez/opencv/archive/3.1.0.zip;
       unzip -q 3.1.0.zip;
       cd opencv-3.1.0;
-      mkdir build;
+      sudo mkdir build;
       cd build;
+      sudo cmake -D CMAKE_BUILD_TYPE=RELEASE -D WITH_V4L=ON ..;
     fi
 
 before_script: