diff --git a/btle/btle_discovery.h b/btle/btle_discovery.h
index ebaaf62..3235e7b 100644
--- a/btle/btle_discovery.h
+++ b/btle/btle_discovery.h
@@ -151,6 +151,9 @@ private:
             return numIndices;
         }
 
+        /**
+         * Trigger UUID discovery for the first of the enqueued ServiceIndices.
+         */
         void triggerFirst(void);
 
     private: