diff --git a/usr.bin/env/env.c b/usr.bin/env/env.c
--- a/usr.bin/env/env.c
+++ b/usr.bin/env/env.c
@@ -207,6 +207,8 @@
 	}
 	for (ep = environ; *ep; ep++)
 		(void)printf("%s%c", *ep, term);
+	if (fflush(stdout) != 0)
+		err(1, "stdout");
 	exit(0);
 }