1 files changed, 2 insertions, 2 deletions
diff --git a/ui/qt/display_filter_edit.h b/ui/qt/display_filter_edit.h
index 896b9da09d..74f373a09f 100644
--- a/ui/qt/display_filter_edit.h
+++ b/ui/qt/display_filter_edit.h
@@ -56,9 +56,9 @@ private:
     QToolButton *apply_button_;
 
 signals:
-    void pushFilterSyntaxStatus(QString&);
+    void pushFilterSyntaxStatus(const QString&);
     void popFilterSyntaxStatus();
-    void pushFilterSyntaxWarning(QString&);
+    void pushFilterSyntaxWarning(const QString&);
     void filterPackets(QString& new_filter, bool force);
     void addBookmark(QString filter);