diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index a019d0a9ac..f445ef28ec 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -1044,7 +1044,9 @@ vg_get_config(VuDev *dev, uint8_t *config, uint32_t len)
 {
     VuGpu *g = container_of(dev, VuGpu, dev.parent);
 
-    g_return_val_if_fail(len <= sizeof(struct virtio_gpu_config), -1);
+    if (len > sizeof(struct virtio_gpu_config)) {
+        return -1;
+    }
 
     if (opt_virgl) {
         g->virtio_config.num_capsets = vg_virgl_get_num_capsets();