diff --git a/src/modules/wl_desktop_shell/xdg.c b/src/modules/wl_desktop_shell/xdg.c
index e5e47c197..1c9bd3bfa 100644
--- a/src/modules/wl_desktop_shell/xdg.c
+++ b/src/modules/wl_desktop_shell/xdg.c
@@ -56,7 +56,7 @@ _validate_size(struct wl_resource *resource, int32_t value)
 static void
 _validate_size_negative(struct wl_resource *resource, int32_t value)
 {
-   if (value <= 0)
+   if (value < 0)
      wl_resource_post_error(resource, XDG_POSITIONER_ERROR_INVALID_INPUT, "Invalid size passed");
 }