diff --git a/examples/quick/ApplicationWindow.qml b/examples/quick/ApplicationWindow.qml
index d91b0f3..a6d4b8b 100644
--- a/examples/quick/ApplicationWindow.qml
+++ b/examples/quick/ApplicationWindow.qml
@@ -43,7 +43,13 @@ FramelessApplicationWindow {
         }
         return FramelessUtils.defaultSystemLightColor;
     }
-    onClosing: Settings.saveGeometry(window)
+    Connections {
+        target: window
+        function onClosing(close)
+        {
+            Settings.saveGeometry(window)
+        }
+    }
 
     FramelessHelper.onReady: {
         // Let FramelessHelper know what's our homemade title bar, otherwise
diff --git a/examples/quick/Window.qml b/examples/quick/Window.qml
index af0b979..f318e8e 100644
--- a/examples/quick/Window.qml
+++ b/examples/quick/Window.qml
@@ -43,7 +43,13 @@ FramelessWindow {
         }
         return FramelessUtils.defaultSystemLightColor;
     }
-    onClosing: Settings.saveGeometry(window)
+    Connections {
+        target: window
+        function onClosing(close)
+        {
+            Settings.saveGeometry(window)
+        }
+    }
 
     FramelessHelper.onReady: {
         // Let FramelessHelper know what's our homemade title bar, otherwise
diff --git a/qmake/core.pri b/qmake/core.pri
index 54cf9c6..c91662e 100644
--- a/qmake/core.pri
+++ b/qmake/core.pri
@@ -64,6 +64,9 @@ win32 {
 }
 
 unix:!macx {
+    CONFIG += link_pkgconfig
+    PKGCONFIG += gtk+-3.0
+    DEFINES += GDK_VERSION_MIN_REQUIRED=GDK_VERSION_3_6
     HEADERS += \
         $$CORE_PUB_INC_DIR/framelesshelper_linux.h
     SOURCES += \