diff --git a/src/common/remoteio.c b/src/common/remoteio.c
--- a/src/common/remoteio.c
+++ b/src/common/remoteio.c
@@ -22,10 +22,12 @@
 #include "execio.h"
 #include "asprintf.h"
 
+#include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <errno.h>
+#include <unistd.h>
+
 #ifndef WINDOWS
 #include <sys/socket.h>
 #include <sys/un.h>