diff --git a/msg/tune_control.msg b/msg/tune_control.msg
index 90569d309c..d35188516a 100644
--- a/msg/tune_control.msg
+++ b/msg/tune_control.msg
@@ -18,5 +18,5 @@ uint8 HOME_SET = 15
 
 uint8 tune_id
 uint16 frequency
-uint16 duration   # in ms
+uint32 duration   # in us
 uint8 strength    # value between 0-100 if supported by backend