diff --git a/src/plugins/debugger/debuggertooltipmanager.h b/src/plugins/debugger/debuggertooltipmanager.h
index c6d000d715d..a3b9f8c3a68 100644
--- a/src/plugins/debugger/debuggertooltipmanager.h
+++ b/src/plugins/debugger/debuggertooltipmanager.h
@@ -15,7 +15,6 @@ class StackFrame;
 class DebuggerToolTipContext
 {
 public:
-    DebuggerToolTipContext();
     bool isValid() const { return !expression.isEmpty(); }
     bool matchesFrame(const StackFrame &frame) const;
     bool isSame(const DebuggerToolTipContext &other) const;