diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 7664be10a0..dab3bf9c98 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -14,12 +14,17 @@
 #include <glib.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#include <sys/wait.h>
 #include "qga/guest-agent-core.h"
 #include "qga-qmp-commands.h"
 #include "qerror.h"
 #include "qemu-queue.h"
 #include "host-utils.h"
 
+#ifndef CONFIG_HAS_ENVIRON
+extern char **environ;
+#endif
+
 #if defined(__linux__)
 #include <mntent.h>
 #include <linux/fs.h>
@@ -27,7 +32,6 @@
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <net/if.h>
-#include <sys/wait.h>
 
 #if defined(__linux__) && defined(FIFREEZE)
 #define CONFIG_FSFREEZE