diff --git a/src/gtk/display.cpp b/src/gtk/display.cpp
index d6562511b8..db1116820d 100644
--- a/src/gtk/display.cpp
+++ b/src/gtk/display.cpp
@@ -58,7 +58,7 @@ wx_gdk_screen_get_monitor_workarea(GdkScreen* screen, int monitor, GdkRectangle*
         if (GDK_IS_X11_SCREEN(screen))
 #endif
         {
-            GdkRectangle rect = { 0 };
+            GdkRectangle rect = { 0, 0, 0, 0 };
             wxGetWorkAreaX11(GDK_SCREEN_XSCREEN(screen),
                 rect.x, rect.y, rect.width, rect.height);
             // in case _NET_WORKAREA result is too large