diff --git a/libc/upstream-freebsd/freebsd-compat.h b/libc/upstream-freebsd/freebsd-compat.h
index 08dec15..697ddcb 100644
--- a/libc/upstream-freebsd/freebsd-compat.h
+++ b/libc/upstream-freebsd/freebsd-compat.h
@@ -17,4 +17,12 @@
 #ifndef _BIONIC_FREEBSD_COMPAT_H_included
 #define _BIONIC_FREEBSD_COMPAT_H_included
 
+#define __USE_BSD
+
+#define _close close
+#define _fcntl fcntl
+#define _open open
+
+#define _sseek __sseek /* Needed as long as we have a mix of OpenBSD and FreeBSD stdio. */
+
 #endif