diff --git a/src/plugins/debugger/debuggerengine.h b/src/plugins/debugger/debuggerengine.h
index 4b840640ce5..310b1684371 100644
--- a/src/plugins/debugger/debuggerengine.h
+++ b/src/plugins/debugger/debuggerengine.h
@@ -98,7 +98,6 @@ public:
     QString coreFile;
     QString overrideStartScript; // Used in attach to core and remote debugging
     QString startMessage; // First status message shown.
-    QMap<QString, QString> sourcePathMap;
     QString debugInfoLocation; // Gdb "set-debug-file-directory".
     QStringList debugSourceLocation; // Gdb "directory"
     QString serverStartScript;
diff --git a/src/plugins/debugger/debuggerstartparameters.h b/src/plugins/debugger/debuggerstartparameters.h
index ac680ed896f..a7b75830e58 100644
--- a/src/plugins/debugger/debuggerstartparameters.h
+++ b/src/plugins/debugger/debuggerstartparameters.h
@@ -95,6 +95,9 @@ public:
     QSsh::SshConnectionParameters connParams;
     bool remoteSetupNeeded = false;
 
+    // Used by Mer plugin (3rd party)
+    QMap<QString, QString> sourcePathMap;
+
     // Used by baremetal plugin
     QByteArray commandsForReset; // commands used for resetting the inferior
     bool useContinueInsteadOfRun = false; // if connected to a hw debugger run is not possible but continue is used