diff --git a/maintainer/travis/build_cmake.sh b/maintainer/travis/build_cmake.sh
index 5e42edaee0b..aef61edfc9f 100755
--- a/maintainer/travis/build_cmake.sh
+++ b/maintainer/travis/build_cmake.sh
@@ -60,7 +60,7 @@ outp insource srcdir builddir \
     with_tcl with_python_interface myconfig check_procs
 
 # check indentation of python files
-pep8 --filename=*.pyx/,*.pxd,*.py --select=E111 $srcdir/src/python/espressomd/
+pep8 --filename=*.pyx,*.pxd,*.py --select=E111 $srcdir/src/python/espressomd/
 ec=$?
 if [ $ec -eq 0 ]; then
     echo ""