diff --git a/.travis.yml b/.travis.yml
index 6d188401..fb8ddb2c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,11 @@ virtualenv:
 before_install: 
   - sudo apt-get install -qq python-scipy python-pip
   - sudo apt-get install -qq python-matplotlib
+  # Workaround for a permissions issue with Travis virtual machine images
+  # that breaks Python's multiprocessing:
+  # https://github.com/travis-ci/travis-cookbooks/issues/155
+  - sudo rm -rf /dev/shm
+  - sudo ln -s /run/shm /dev/shm
 
 install:
   - pip install --upgrade numpy==1.7.1