diff --git a/plugins/channelrx/demoddsc/coaststations.cpp b/plugins/channelrx/demoddsc/coaststations.cpp
index b096095e1..4d8b99c9a 100644
--- a/plugins/channelrx/demoddsc/coaststations.cpp
+++ b/plugins/channelrx/demoddsc/coaststations.cpp
@@ -19,7 +19,7 @@
 
 // Map from MMSI to Coast Station Name
 // From https://www.itu.int/mmsapp/coaststation/list
-QMap<QString, QString> CoastStations {
+const QMap<QString, QString> CoastStations {
     {"003311000", "AASIAAT RADIO"},
     {"004224102", "ABADAN RADIO"},
     {"004224300", "ABBAS RADIO"},
diff --git a/plugins/channelrx/demoddsc/coaststations.h b/plugins/channelrx/demoddsc/coaststations.h
index 77c51a0f8..ea3fe2574 100644
--- a/plugins/channelrx/demoddsc/coaststations.h
+++ b/plugins/channelrx/demoddsc/coaststations.h
@@ -20,6 +20,6 @@
 
 #include <QMap>
 
-extern QMap<QString, QString> CoastStations;
+extern const QMap<QString, QString> CoastStations;
 
 #endif /* INCLUDE_COASTSTATIONS_H */