diff --git a/source/_integrations/modbus.markdown b/source/_integrations/modbus.markdown
index 0f8d1279f8f..1fe6b4eb224 100644
--- a/source/_integrations/modbus.markdown
+++ b/source/_integrations/modbus.markdown
@@ -627,6 +627,11 @@ fans:
           required: false
           default: write address
           type: integer
+        delay:
+          description: delay between write and verify.
+          required: false
+          default: 0
+          type: integer
         input_type:
           description: Type of address (holding/coil/discrete/input).
           required: false
@@ -711,6 +716,11 @@ lights:
           required: false
           default: write address
           type: integer
+        delay:
+          description: delay between write and verify.
+          required: false
+          default: 0
+          type: integer
         input_type:
           description: Type of address (holding/coil/discrete/input).
           required: false