diff --git a/lib/matplotlib/compat/subprocess.py b/lib/matplotlib/compat/subprocess.py
index 6918e7d78be0..874ccc05bfb9 100644
--- a/lib/matplotlib/compat/subprocess.py
+++ b/lib/matplotlib/compat/subprocess.py
@@ -18,7 +18,7 @@
 
 import subprocess
 
-__all__ = ['Popen', 'PIPE', 'STDOUT', 'check_output']
+__all__ = ['Popen', 'PIPE', 'STDOUT', 'check_output', 'CalledProcessError']
 
 
 if hasattr(subprocess, 'Popen'):