diff --git a/src/blackmisc/aviation/callsignobjectlist.cpp b/src/blackmisc/aviation/callsignobjectlist.cpp
index b39ece4d6..7f143a80a 100644
--- a/src/blackmisc/aviation/callsignobjectlist.cpp
+++ b/src/blackmisc/aviation/callsignobjectlist.cpp
@@ -45,9 +45,9 @@ namespace BlackMisc
         }
 
         template <class OBJ, class CONTAINER>
-        int ICallsignObjectList<OBJ, CONTAINER>::applyIfCallsign(const CCallsign &callsign, const CPropertyIndexVariantMap &variantMap)
+        int ICallsignObjectList<OBJ, CONTAINER>::applyIfCallsign(const CCallsign &callsign, const CPropertyIndexVariantMap &variantMap, bool skipEqualValues)
         {
-            return this->container().applyIf(&OBJ::getCallsign, callsign, variantMap);
+            return this->container().applyIf(&OBJ::getCallsign, callsign, variantMap, skipEqualValues);
         }
 
         template <class OBJ, class CONTAINER>
diff --git a/src/blackmisc/aviation/callsignobjectlist.h b/src/blackmisc/aviation/callsignobjectlist.h
index 333ca1f72..c306f3042 100644
--- a/src/blackmisc/aviation/callsignobjectlist.h
+++ b/src/blackmisc/aviation/callsignobjectlist.h
@@ -54,7 +54,7 @@ namespace BlackMisc
             bool containsCallsign(const BlackMisc::Aviation::CCallsign &callsign) const;
 
             //! Apply for given callsign
-            int applyIfCallsign(const BlackMisc::Aviation::CCallsign &callsign, const BlackMisc::CPropertyIndexVariantMap &variantMap);
+            int applyIfCallsign(const BlackMisc::Aviation::CCallsign &callsign, const BlackMisc::CPropertyIndexVariantMap &variantMap, bool skipEqualValues = true);
 
             //! All callsigns
             BlackMisc::Aviation::CCallsignSet getCallsigns() const;