diff --git a/bsd/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c b/bsd/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
index 1dfc82d44e7857f7efd52a309d74e452c8687bdb..c203a42b3bcbec5d67cb76a3673eceb4581e9485 100644
--- a/bsd/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
+++ b/bsd/cddl/contrib/opensolaris/cmd/zfs/zfs_main.c
@@ -56,6 +56,7 @@
 #include <sys/fs/zfs.h>
 #include <sys/types.h>
 #include <time.h>
+#include <err.h>
 
 #include <libzfs.h>
 #include <zfs_prop.h>