diff --git a/src/libusbmuxd.c b/src/libusbmuxd.c
index 613fd1c..f52a1c2 100644
--- a/src/libusbmuxd.c
+++ b/src/libusbmuxd.c
@@ -1060,7 +1060,8 @@
 	num_sent = send(sfd, (void*)data, len, 0);
 	if (num_sent < 0) {
 		*sent_bytes = 0;
-		DEBUG(1, "%s: Error %d when sending: %s\n", __func__, num_sent, strerror(errno));
+		num_sent = errno;
+		DEBUG(1, "%s: Error %d when sending: %s\n", __func__, num_sent, strerror(num_sent));
 		return num_sent;
 	} else if ((uint32_t)num_sent < len) {
 		DEBUG(1, "%s: Warning: Did not send enough (only %d of %d)\n", __func__, num_sent, len);