diff --git a/src/blackmisc/aviation/callsign.cpp b/src/blackmisc/aviation/callsign.cpp
index c4ebda6df..2508dd4c9 100644
--- a/src/blackmisc/aviation/callsign.cpp
+++ b/src/blackmisc/aviation/callsign.cpp
@@ -139,6 +139,13 @@ namespace BlackMisc
                     m_callsign.at(m_callsign.size() - 1) >= 'A' && m_callsign.at(m_callsign.size() - 1) <= 'Z';
         }
 
+        QString CCallsign::getFsdCallsignString() const
+        {
+            // mainly used to fix the cross coupled callsigns such as *EDDF_TWR
+            if (m_callsignAsSet.startsWith('*')) { return this->getStringAsSet(); }
+            return this->asString();
+        }
+
         bool CCallsign::isSameAsSet() const
         {
             return m_callsign == m_callsignAsSet;
diff --git a/src/blackmisc/aviation/callsign.h b/src/blackmisc/aviation/callsign.h
index 9da2a8637..c6fee5d51 100644
--- a/src/blackmisc/aviation/callsign.h
+++ b/src/blackmisc/aviation/callsign.h
@@ -89,6 +89,9 @@ namespace BlackMisc
             //! Get callsign.
             const QString &getStringAsSet() const { return m_callsignAsSet; }
 
+            //! The callsign string used with FSD
+            QString getFsdCallsignString() const;
+
             //! Same as set callsign?
             bool isSameAsSet() const;