diff --git a/frc971/control_loops/python/BUILD b/frc971/control_loops/python/BUILD
index b79d676..bb2a754 100644
--- a/frc971/control_loops/python/BUILD
+++ b/frc971/control_loops/python/BUILD
@@ -11,4 +11,7 @@
   deps = [
     '//external:slycot',
   ],
+  data = [
+    '//third_party/cddlib:_cddlib.so',
+  ],
 )
diff --git a/frc971/control_loops/python/libcdd.py b/frc971/control_loops/python/libcdd.py
index 8a0cba6..b46d908 100644
--- a/frc971/control_loops/python/libcdd.py
+++ b/frc971/control_loops/python/libcdd.py
@@ -5,6 +5,7 @@
 __author__ = 'Austin Schuh (austin.linux@gmail.com)'
 
 import ctypes
+import os
 import sys
 
 # Wrapper around PyFile_AsFile so that we can print out the error messages.
@@ -19,7 +20,15 @@
 # manipulate half space and vertex representations of polytopes.
 # Unfortunately, the library was compiled with C++ even though it has a lot of C
 # code in it, so all the symbol names are mangled.  Ug.
-libcdd = ctypes.cdll.LoadLibrary('libcdd.so')
+libcdd = None
+for path in os.environ.get('PYTHONPATH').split(':'):
+  try:
+    libcdd = ctypes.cdll.LoadLibrary(os.path.join(path, 'third_party/cddlib/_cddlib.so'))
+  except OSError, e:
+    pass
+
+assert libcdd is not None, 'Failed to find _cddlib.so'
+
 libcdd.dd_set_global_constants()
 
 # The variable type mytype that libcdd defines (double[1])