diff --git a/pyext/ctools/__init__.py b/pyext/ctools/__init__.py
index c9d32d9..72ca4a2 100644
--- a/pyext/ctools/__init__.py
+++ b/pyext/ctools/__init__.py
@@ -10,7 +10,6 @@ for entry in bad_entries:
 
 # Clean-up
 del tools
-del ctools
 del gammalib
 del bad_entries
 del entry
\ No newline at end of file