diff --git a/libcni/api.go b/libcni/api.go
index 6ac26949..3c50535e 100644
--- a/libcni/api.go
+++ b/libcni/api.go
@@ -776,7 +776,7 @@ func (c *CNIConfig) GCNetworkList(ctx context.Context, list *NetworkConfigList,
 	// First, get the list of cached attachments
 	cachedAttachments, err := c.GetCachedAttachments("")
 	if err != nil {
-		return nil
+		return err
 	}
 
 	var validAttachments map[types.GCAttachment]interface{}