diff --git a/voltha b/voltha
index 4685cce..6ea3deb 100755
--- a/voltha
+++ b/voltha
@@ -189,6 +189,7 @@
     VOLTHA_CHART_VERSION \
     VOLTHA_BBSIM_CHART \
     VOLTHA_BBSIM_CHART_VERSION \
+    NUM_OF_BBSIM \
     VOLTHA_ADAPTER_SIM_CHART \
     VOLTHA_ADAPTER_SIM_CHART_VERSION \
     VOLTHA_ADAPTER_OPEN_OLT_CHART \