diff --git a/dlls/winex11.drv/wintab.c b/dlls/winex11.drv/wintab.c
index ca0f35ee09..3642a47b02 100644
--- a/dlls/winex11.drv/wintab.c
+++ b/dlls/winex11.drv/wintab.c
@@ -536,6 +536,8 @@ BOOL CDECL X11DRV_LoadTabletInfo(HWND hwnddefault)
     gSysContext.lcSensZ = 65536;
     gSysContext.lcSysSensX= 65536;
     gSysContext.lcSysSensY= 65536;
+    gSysContext.lcOutExtX= GetSystemMetrics(SM_CXSCREEN);
+    gSysContext.lcOutExtY= GetSystemMetrics(SM_CYSCREEN);
 
     /* initialize cursors */
     disable_system_cursors();