diff --git a/cddl/compat/opensolaris/misc/fsshare.c b/cddl/compat/opensolaris/misc/fsshare.c
index e8faa928d6fb..c3247f91fec4 100644
--- a/cddl/compat/opensolaris/misc/fsshare.c
+++ b/cddl/compat/opensolaris/misc/fsshare.c
@@ -223,6 +223,7 @@ fsshare_main(const char *file, const char *mountpoint, const char *shareopts,
 			error = errno;
 			unlink(tmpfile);
 		} else {
+			fflush(newfd);
 			/*
 			 * Send SIGHUP to mountd, but unlock exports file later.
 			 */