diff --git a/ui/logray/logray_main_window.cpp b/ui/logray/logray_main_window.cpp
index 8a3b38b0b3..8b739c0f96 100644
--- a/ui/logray/logray_main_window.cpp
+++ b/ui/logray/logray_main_window.cpp
@@ -327,8 +327,6 @@ LograyMainWindow::LograyMainWindow(QWidget *parent) :
     , capture_options_dialog_(NULL)
     , info_data_()
 #endif
-    , display_filter_dlg_(NULL)
-    , capture_filter_dlg_(NULL)
 #if defined(Q_OS_MAC)
     , dock_menu_(NULL)
 #endif
@@ -706,8 +704,6 @@ LograyMainWindow::~LograyMainWindow()
     // freed by its parent. Free then here explicitly to avoid leak and numerous
     // Valgrind complaints.
     delete file_set_dialog_;
-    delete capture_filter_dlg_;
-    delete display_filter_dlg_;
 #ifdef HAVE_LIBPCAP
     delete capture_options_dialog_;
 #endif
diff --git a/ui/logray/logray_main_window.h b/ui/logray/logray_main_window.h
index 280154600b..92112579df 100644
--- a/ui/logray/logray_main_window.h
+++ b/ui/logray/logray_main_window.h
@@ -180,8 +180,6 @@ private:
     CaptureOptionsDialog *capture_options_dialog_;
     info_data_t info_data_;
 #endif
-    FilterDialog *display_filter_dlg_;
-    FilterDialog *capture_filter_dlg_;
 
 #if defined(Q_OS_MAC)
     QMenu *dock_menu_;
diff --git a/ui/logray/logray_main_window_slots.cpp b/ui/logray/logray_main_window_slots.cpp
index badbf53fff..d8465aca6d 100644
--- a/ui/logray/logray_main_window_slots.cpp
+++ b/ui/logray/logray_main_window_slots.cpp
@@ -2733,12 +2733,10 @@ void LograyMainWindow::connectCaptureMenuActions()
     });
 
     connect(main_ui_->actionCaptureCaptureFilters, &QAction::triggered, this, [this]() {
-        if (!capture_filter_dlg_) {
-            capture_filter_dlg_ = new FilterDialog(this, FilterDialog::CaptureFilter);
-        }
-        capture_filter_dlg_->show();
-        capture_filter_dlg_->raise();
-        capture_filter_dlg_->activateWindow();
+        FilterDialog *capture_filter_dlg = new FilterDialog(window(), FilterDialog::CaptureFilter);
+        capture_filter_dlg->setWindowModality(Qt::ApplicationModal);
+        capture_filter_dlg->setAttribute(Qt::WA_DeleteOnClose);
+        capture_filter_dlg->show();
     });
 
 #ifdef HAVE_LIBPCAP
@@ -2882,12 +2880,10 @@ void LograyMainWindow::matchFieldFilter(FilterAction::Action action, FilterActio
 
 void LograyMainWindow::on_actionAnalyzeDisplayFilters_triggered()
 {
-    if (!display_filter_dlg_) {
-        display_filter_dlg_ = new FilterDialog(this, FilterDialog::DisplayFilter);
-    }
-    display_filter_dlg_->show();
-    display_filter_dlg_->raise();
-    display_filter_dlg_->activateWindow();
+    FilterDialog *display_filter_dlg = new FilterDialog(window(), FilterDialog::DisplayFilter);
+    display_filter_dlg->setWindowModality(Qt::ApplicationModal);
+    display_filter_dlg->setAttribute(Qt::WA_DeleteOnClose);
+    display_filter_dlg->show();
 }
 
 struct epan_uat;
diff --git a/ui/qt/wireshark_main_window.cpp b/ui/qt/wireshark_main_window.cpp
index 0f2632b525..186fed40f2 100644
--- a/ui/qt/wireshark_main_window.cpp
+++ b/ui/qt/wireshark_main_window.cpp
@@ -329,8 +329,6 @@ WiresharkMainWindow::WiresharkMainWindow(QWidget *parent) :
     , capture_options_dialog_(NULL)
     , info_data_()
 #endif
-    , display_filter_dlg_(NULL)
-    , capture_filter_dlg_(NULL)
 #if defined(Q_OS_MAC)
     , dock_menu_(NULL)
 #endif
@@ -759,8 +757,6 @@ WiresharkMainWindow::~WiresharkMainWindow()
     // freed by its parent. Free then here explicitly to avoid leak and numerous
     // Valgrind complaints.
     delete file_set_dialog_;
-    delete capture_filter_dlg_;
-    delete display_filter_dlg_;
 #ifdef HAVE_LIBPCAP
     delete capture_options_dialog_;
 #endif
diff --git a/ui/qt/wireshark_main_window.h b/ui/qt/wireshark_main_window.h
index c455345416..2ea1afe3dd 100644
--- a/ui/qt/wireshark_main_window.h
+++ b/ui/qt/wireshark_main_window.h
@@ -189,8 +189,6 @@ private:
     CaptureOptionsDialog *capture_options_dialog_;
     info_data_t info_data_;
 #endif
-    FilterDialog *display_filter_dlg_;
-    FilterDialog *capture_filter_dlg_;
 
 #if defined(Q_OS_MAC)
     QMenu *dock_menu_;
diff --git a/ui/qt/wireshark_main_window_slots.cpp b/ui/qt/wireshark_main_window_slots.cpp
index 6a3b4e2edb..15d5d12f9c 100644
--- a/ui/qt/wireshark_main_window_slots.cpp
+++ b/ui/qt/wireshark_main_window_slots.cpp
@@ -2905,12 +2905,10 @@ void WiresharkMainWindow::connectCaptureMenuActions()
     });
 
     connect(main_ui_->actionCaptureCaptureFilters, &QAction::triggered, this, [this]() {
-        if (!capture_filter_dlg_) {
-            capture_filter_dlg_ = new FilterDialog(this, FilterDialog::CaptureFilter);
-        }
-        capture_filter_dlg_->show();
-        capture_filter_dlg_->raise();
-        capture_filter_dlg_->activateWindow();
+        FilterDialog *capture_filter_dlg = new FilterDialog(window(), FilterDialog::CaptureFilter);
+        capture_filter_dlg->setWindowModality(Qt::ApplicationModal);
+        capture_filter_dlg->setAttribute(Qt::WA_DeleteOnClose);
+        capture_filter_dlg->show();
     });
 
 #ifdef HAVE_LIBPCAP
@@ -3054,12 +3052,10 @@ void WiresharkMainWindow::matchFieldFilter(FilterAction::Action action, FilterAc
 
 void WiresharkMainWindow::on_actionAnalyzeDisplayFilters_triggered()
 {
-    if (!display_filter_dlg_) {
-        display_filter_dlg_ = new FilterDialog(this, FilterDialog::DisplayFilter);
-    }
-    display_filter_dlg_->show();
-    display_filter_dlg_->raise();
-    display_filter_dlg_->activateWindow();
+    FilterDialog *display_filter_dlg = new FilterDialog(window(), FilterDialog::DisplayFilter);
+    display_filter_dlg->setWindowModality(Qt::ApplicationModal);
+    display_filter_dlg->setAttribute(Qt::WA_DeleteOnClose);
+    display_filter_dlg->show();
 }
 
 struct epan_uat;