diff --git a/COPYING b/COPYING
index c225ede..7fd11fa 100644
--- a/COPYING
+++ b/COPYING
@@ -364,7 +364,6 @@ Files:
  man/strtonum.3bsd
  src/arc4random.c
  src/arc4random_linux.h
- src/arc4random_openbsd.h
  src/arc4random_uniform.c
  src/arc4random_unix.h
  src/arc4random_win.h
diff --git a/src/Makefile.am b/src/Makefile.am
index ea0bdbe..7cf4a09 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -66,7 +66,6 @@ libbsd_la_SOURCES = \
 	arc4random.c \
 	arc4random.h \
 	arc4random_linux.h \
-	arc4random_openbsd.h \
 	arc4random_uniform.c \
 	arc4random_unix.h \
 	arc4random_win.h \
diff --git a/src/arc4random.h b/src/arc4random.h
index 812188b..b8675b4 100644
--- a/src/arc4random.h
+++ b/src/arc4random.h
@@ -32,9 +32,7 @@
 int
 getentropy(void *buf, size_t len);
 
-#if defined(__OpenBSD__)
-#include "arc4random_openbsd.h"
-#elif defined(__linux__)
+#if defined(__linux__)
 #include "arc4random_linux.h"
 #elif defined(_WIN32)
 #include "arc4random_win.h"
diff --git a/src/arc4random_openbsd.h b/src/arc4random_openbsd.h
deleted file mode 100644
index 9cd8b68..0000000
--- a/src/arc4random_openbsd.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*	$OpenBSD: arc4random.h,v 1.3 2014/07/20 20:51:13 bcook Exp $	*/
-
-/*
- * Copyright (c) 1996, David Mazieres <dm@uun.org>
- * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
- * Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
- * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-/*
- * Stub functions for portability.
- */
-#include <sys/mman.h>
-
-#include <signal.h>
-
-#include "thread_private.h"
-
-static inline void
-_getentropy_fail(void)
-{
-	raise(SIGKILL);
-}
-
-static inline int
-_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
-{
-	struct {
-		struct _rs rs;
-		struct _rsx rsx;
-	} *p;
-
-	if ((p = mmap(NULL, sizeof(*p), PROT_READ|PROT_WRITE,
-	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
-		return (-1);
-	if (minherit(p, sizeof(*p), MAP_INHERIT_ZERO) == -1) {
-		munmap(p, sizeof(*p));
-		return (-1);
-	}
-
-	*rsp = &p->rs;
-	*rsxp = &p->rsx;
-	return (0);
-}
-
-static inline void
-_rs_forkdetect(void)
-{
-}