diff --git a/src/blacksim/fscommon/aircraftindexer.h b/src/blacksim/fscommon/aircraftindexer.h
index 514972d3b..159d068d3 100644
--- a/src/blacksim/fscommon/aircraftindexer.h
+++ b/src/blacksim/fscommon/aircraftindexer.h
@@ -23,6 +23,7 @@ namespace BlackSim
             CAircraftCfgEntriesList m_entries; //!< all entries
 
         signals:
+            //! Number of entries read
             void entriesRead(int number);
 
         public: