diff --git a/source/_integrations/modbus.markdown b/source/_integrations/modbus.markdown
index 78f4c4a03d6..23577fcdae1 100644
--- a/source/_integrations/modbus.markdown
+++ b/source/_integrations/modbus.markdown
@@ -219,7 +219,7 @@ name:
   required: true
   type: string
 scan_interval:
-  description: Defines the update interval of the entity in seconds.
+  description: Defines the update interval of the entity in seconds, if scan_interval = 0 polling is stopped. Entities are unavailable until the first response is received, except for entities with scan_interval = 0, these entities are available from startup.
   required: false
   type: integer
   default: 10