diff --git a/src/blackmisc/aviation/callsign.cpp b/src/blackmisc/aviation/callsign.cpp
index 6c91a3b2e..a86f206bf 100644
--- a/src/blackmisc/aviation/callsign.cpp
+++ b/src/blackmisc/aviation/callsign.cpp
@@ -33,6 +33,11 @@ namespace BlackMisc
             return m_callsign;
         }
 
+        void CCallsign::clear()
+        {
+            *this = CCallsign();
+        }
+
         QString CCallsign::unifyCallsign(const QString &callsign)
         {
             return removeChars(callsign.toUpper().trimmed(), [](QChar c) { return !c.isLetterOrNumber() && c != '_'; });
diff --git a/src/blackmisc/aviation/callsign.h b/src/blackmisc/aviation/callsign.h
index 193d972f0..97d52fd83 100644
--- a/src/blackmisc/aviation/callsign.h
+++ b/src/blackmisc/aviation/callsign.h
@@ -162,6 +162,9 @@ namespace BlackMisc
             //! \copydoc BlackMisc::Mixin::String::toQString()
             QString convertToQString(bool i18n = false) const;
 
+            //! Clear this callsign
+            void clear();
+
             //! Register metadata
             static void registerMetadata();