FIX added missing GTK3 fix from PR

1 files changed, 11 insertions, 8 deletions

diff --git a/modules/computer/os.c b/modules/computer/os.c
index 2e53fd7e..7648eef3 100644
--- a/modules/computer/os.c
+++ b/modules/computer/os.c
@@ -157,14 +157,17 @@ detect_mate_version(void)
 static gchar *
 detect_window_manager(void)
 {
-    GdkScreen *screen = gdk_screen_get_default();
-    const gchar *windowman;
-    const gchar *curdesktop;
-
-    if (!screen || !GDK_IS_SCREEN(screen))
-        return NULL;
-
-    windowman = gdk_x11_screen_get_window_manager_name(screen);
+  const gchar *curdesktop;
+  const gchar* windowman;
+  GdkScreen *screen = gdk_screen_get_default();
+
+#if GTK_CHECK_VERSION(3,0,0)
+    if (GDK_IS_X11_SCREEN(screen)) {
+#else
+    if (screen && GDK_IS_SCREEN(screen)) {
+#endif
+      windowman = gdk_x11_screen_get_window_manager_name(screen);
+    } else return g_strdup("Not X11");
 
     if (g_str_equal(windowman, "Xfwm4"))
         return g_strdup("XFCE 4");