diff --git a/common/cmd_net.c b/common/cmd_net.c
index c9ce85f..a1ff2ba 100644
--- a/common/cmd_net.c
+++ b/common/cmd_net.c
@@ -132,12 +132,16 @@
 		return 1;
 	}
 
-	if ((size = NetLoop(proto)) == 0)
+	if ((size = NetLoop(proto)) < 0)
 		return 1;
 
 	/* NetLoop ok, update environment */
 	netboot_update_env();
 
+	/* done if no file was loaded (no errors though) */
+	if (size == 0)
+		return 0;
+
 	/* flush cache */
 	flush_cache(load_addr, size);