diff --git a/homeassistant/components/timer/services.yaml b/homeassistant/components/timer/services.yaml
index ac5453d38c91..cc14e6332f13 100644
--- a/homeassistant/components/timer/services.yaml
+++ b/homeassistant/components/timer/services.yaml
@@ -8,7 +8,7 @@ start:
     duration:
       example: "00:01:00 or 60"
       selector:
-        text:
+        duration:
 
 pause:
   target: