diff --git a/arch/sandbox/cpu/eth-raw-os.c b/arch/sandbox/cpu/eth-raw-os.c
index e59b96be5f..92c35aed95 100644
--- a/arch/sandbox/cpu/eth-raw-os.c
+++ b/arch/sandbox/cpu/eth-raw-os.c
@@ -256,7 +256,7 @@ int sandbox_eth_raw_os_send(void *packet, int length,
 		       strerror(errno));
 		return -errno;
 	}
-	return retval;
+	return 0;
 }
 
 int sandbox_eth_raw_os_recv(void *packet, int *length,