diff --git a/src/backend/port/dynloader/bsd.h b/src/backend/port/dynloader/bsd.h
new file mode 100644
index 0000000000..0f396c7a03
--- /dev/null
+++ b/src/backend/port/dynloader/bsd.h
@@ -0,0 +1,48 @@
+/*-------------------------------------------------------------------------
+ *
+ * port-protos.h--
+ *	  port-specific prototypes for NetBSD 1.0
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: bsd.h,v 1.1 1997/12/19 23:17:42 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PORT_PROTOS_H
+#define PORT_PROTOS_H
+
+#include <sys/types.h>
+#include <nlist.h>
+#include <link.h>
+
+#include "postgres.h"
+
+#include "fmgr.h"				/* for func_ptr */
+#include "utils/dynamic_loader.h"
+
+/* dynloader.c */
+/*
+ * Dynamic Loader on NetBSD 1.0.
+ *
+ * this dynamic loader uses the system dynamic loading interface for shared
+ * libraries (ie. dlopen/dlsym/dlclose). The user must specify a shared
+ * library as the file to be dynamically loaded.
+ *
+ * agc - I know this is all a bit crufty, but it does work, is fairly
+ * portable, and works (the stipulation that the d.l. function must
+ * begin with an underscore is fairly tricky, and some versions of
+ * NetBSD (like 1.0, and 1.0A pre June 1995) have no dlerror.)
+ */
+#define		   pg_dlopen(f)    BSD44_derived_dlopen(f, 1)
+#define		   pg_dlsym		   BSD44_derived_dlsym
+#define		   pg_dlclose	   BSD44_derived_dlclose
+#define		   pg_dlerror	   BSD44_derived_dlerror
+
+char	   *BSD44_derived_dlerror(void);
+void	   *BSD44_derived_dlopen(const char *filename, int num);
+void	   *BSD44_derived_dlsym(void *handle, const char *name);
+void		BSD44_derived_dlclose(void *handle);
+
+#endif							/* PORT_PROTOS_H */