diff --git a/.travis/prepare.sh b/.travis/prepare.sh
index cfc1b174f..752be9fa3 100755
--- a/.travis/prepare.sh
+++ b/.travis/prepare.sh
@@ -2,3 +2,4 @@
 
 git clone git://git.kernel.org/pub/scm/devel/sparse/chrisl/sparse.git
 cd sparse && make && make install && cd ..
+pip install --disable-pip-version-check --user six