diff --git a/src/plugins/debugger/debuggermainwindow.cpp b/src/plugins/debugger/debuggermainwindow.cpp
index 1b7681ad70a..0aa6c7a23fd 100644
--- a/src/plugins/debugger/debuggermainwindow.cpp
+++ b/src/plugins/debugger/debuggermainwindow.cpp
@@ -411,7 +411,7 @@ void Perspective::setAboutToActivateCallback(const Perspective::Callback &cb)
     m_aboutToActivateCallback = cb;
 }
 
-void Perspective::aboutToActivate()
+void Perspective::aboutToActivate() const
 {
     if (m_aboutToActivateCallback)
         m_aboutToActivateCallback();
diff --git a/src/plugins/debugger/debuggermainwindow.h b/src/plugins/debugger/debuggermainwindow.h
index 589055b5a8b..d3e805f492f 100644
--- a/src/plugins/debugger/debuggermainwindow.h
+++ b/src/plugins/debugger/debuggermainwindow.h
@@ -84,7 +84,7 @@ public:
 
     using Callback = std::function<void()>;
     void setAboutToActivateCallback(const Callback &cb);
-    void aboutToActivate();
+    void aboutToActivate() const;
 
 private:
     Perspective(const Perspective &) = delete;