diff --git a/.travis.yml b/.travis.yml
index 0c95396..ac6d98b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,6 +23,7 @@ matrix:
             - automake  # required for patchelf
       before_script:
         - sudo -E apt-get install -y libmagic-dev:i386 libjpeg-dev:i386 libpng-dev:i386
+        - find /usr/include -iname cimg.h
 
 install:
   - git clone https://github.com/NixOS/patchelf.git