diff --git a/cmd/zfs/zfs_main.c b/cmd/zfs/zfs_main.c
index cec025ce6..1ffe805aa 100644
--- a/cmd/zfs/zfs_main.c
+++ b/cmd/zfs/zfs_main.c
@@ -8672,7 +8672,6 @@ main(int argc, char **argv)
 	int i = 0;
 	const char *cmdname;
 	char **newargv;
-	extern char **environ;
 
 	(void) setlocale(LC_ALL, "");
 	(void) setlocale(LC_NUMERIC, "C");
diff --git a/include/libzutil.h b/include/libzutil.h
index 4d4bddaad..948ac08cd 100644
--- a/include/libzutil.h
+++ b/include/libzutil.h
@@ -183,6 +183,7 @@ _LIBZUTIL_H int printf_color(const char *color, const char *format, ...);
 _LIBZUTIL_H const char *zfs_basename(const char *path);
 _LIBZUTIL_H ssize_t zfs_dirnamelen(const char *path);
 #ifdef __linux__
+extern char **environ;
 _LIBZUTIL_H void zfs_setproctitle_init(int argc, char *argv[], char *envp[]);
 _LIBZUTIL_H void zfs_setproctitle(const char *fmt, ...);
 #else