diff --git a/newlib/libc/stdlib/arc4random.c b/newlib/libc/stdlib/arc4random.c
index 0eeaa2ccd..75cdff3bc 100644
--- a/newlib/libc/stdlib/arc4random.c
+++ b/newlib/libc/stdlib/arc4random.c
@@ -193,18 +193,3 @@ arc4random_buf(void *buf, size_t n)
 	_rs_random_buf(buf, n);
 	_ARC4_UNLOCK();
 }
-
-#ifdef __CYGWIN__
-/* Exported functions removed from OpenBSD in the meantime.  Keep them,
-   but make them non-functional.  They don't return a value anyway. */
-void
-arc4random_stir(void)
-{
-}
-
-void
-arc4random_addrandom(u_char *dat, int datlen)
-{
-}
-
-#endif /* __CYGWIN__ */
diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index c6131d156..669548857 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -155,6 +155,7 @@ MT_SAFE_OBJECTS:=
 #
 DLL_OFILES:= \
 	advapi32.o \
+	arc4random_stir.o \
 	assert.o \
 	autoload.o \
 	base64.o \
diff --git a/winsup/cygwin/libc/arc4random_stir.c b/winsup/cygwin/libc/arc4random_stir.c
new file mode 100644
index 000000000..16481303e
--- /dev/null
+++ b/winsup/cygwin/libc/arc4random_stir.c
@@ -0,0 +1,24 @@
+/* libc/arc4random_stir.c
+
+   Copyright 2016 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include <sys/types.h>
+
+/* Exported functions removed from OpenBSD in the meantime.  Keep them,
+   but make them non-functional.  They don't return a value anyway. */
+
+void
+arc4random_stir(void)
+{
+}
+
+void
+arc4random_addrandom(u_char *dat, int datlen)
+{
+}