diff --git a/cd.sh b/cd.sh
index 6b133ff..1c0574c 100644
--- a/cd.sh
+++ b/cd.sh
@@ -573,7 +573,7 @@ ${CD_PYTHON_PACKAGES}
 cd_write_python_module () {
     cd_step "Write Python module"
     cd_write "${CD_PYTHON_PACKAGES}/env.py" "\
-CD_STEP = ${CD_STEP}
+CD_STEP = $((CD_STEP+1))
 
 $(cd_echo CD_OPEN)
 $(cd_echo CD_DOWN)