diff --git a/platform/wayland/cog-viewport-wl.c b/platform/wayland/cog-viewport-wl.c
index 55761fad..f7422ae1 100644
--- a/platform/wayland/cog-viewport-wl.c
+++ b/platform/wayland/cog-viewport-wl.c
@@ -408,7 +408,8 @@ cog_wl_viewport_resize_to_largest_output(CogWlViewport *viewport)
             height = output->height;
         }
     }
-    cog_wl_viewport_configure_geometry(viewport, width, height);
+    if (width > 0 && height >0)
+        cog_wl_viewport_configure_geometry(viewport, width, height);
 }
 
 bool