diff --git a/src/modules/uORB/uORB.h b/src/modules/uORB/uORB.h
index e9c7954bf5..cc79d7cada 100644
--- a/src/modules/uORB/uORB.h
+++ b/src/modules/uORB/uORB.h
@@ -59,7 +59,7 @@ typedef const struct orb_metadata *orb_id_t;
 /**
  * Maximum number of multi topic instances
  */
-#define ORB_MULTI_MAX_INSTANCES	3
+#define ORB_MULTI_MAX_INSTANCES	4
 
 /**
  * Topic priority.