diff --git a/arch/sandbox/cpu/eth-raw-os.c b/arch/sandbox/cpu/eth-raw-os.c
index da01d1a..6a8d809 100644
--- a/arch/sandbox/cpu/eth-raw-os.c
+++ b/arch/sandbox/cpu/eth-raw-os.c
@@ -53,7 +53,7 @@
 	}
 	ret = !!(ifr.ifr_flags & IFF_LOOPBACK);
 out:
-	close(fd);
+	os_close(fd);
 	return ret;
 }
 
@@ -220,7 +220,7 @@
 		struct sockaddr_in addr;
 
 		if (priv->local_bind_sd != -1)
-			close(priv->local_bind_sd);
+			os_close(priv->local_bind_sd);
 
 		/* A normal UDP socket is required to bind */
 		priv->local_bind_sd = socket(AF_INET, SOCK_DGRAM, 0);
@@ -284,11 +284,11 @@
 {
 	free(priv->device);
 	priv->device = NULL;
-	close(priv->sd);
+	os_close(priv->sd);
 	priv->sd = -1;
 	if (priv->local) {
 		if (priv->local_bind_sd != -1)
-			close(priv->local_bind_sd);
+			os_close(priv->local_bind_sd);
 		priv->local_bind_sd = -1;
 		priv->local_bind_udp_port = 0;
 	}
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index e7ec892..c461fb0 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -86,7 +86,10 @@
 
 int os_close(int fd)
 {
-	return close(fd);
+	/* Do not close the console input */
+	if (fd)
+		return close(fd);
+	return -1;
 }
 
 int os_unlink(const char *pathname)