diff --git a/roslib/roslib.d.ts b/roslib/roslib.d.ts
index 72af3a60ab..ad4dbb33b8 100644
--- a/roslib/roslib.d.ts
+++ b/roslib/roslib.d.ts
@@ -310,7 +310,7 @@ declare namespace ROSLIB {
 			compression?: string,
 			throttle_rate?: number,
 			queue_size?: number,
-			latch?: number,
+			latch?: boolean,
 			queue_length?: number
 		});