diff --git a/examples/python/in.pair_python_hybrid b/examples/python/in.pair_python_hybrid
index d5db729bda..5d5157ae6d 100644
--- a/examples/python/in.pair_python_hybrid
+++ b/examples/python/in.pair_python_hybrid
@@ -8,6 +8,8 @@ region		box block 0 10 0 10 0 10
 create_box	2 box
 create_atoms	1 box
 mass		* 1.0
+region          half block -0.1 4.9 0 10 0 10
+set region half type 2
 
 velocity	all create 3.0 87287