diff --git a/include/rpc/xdr.h b/include/rpc/xdr.h
index 624a3c29465..58a26760cb7 100644
--- a/include/rpc/xdr.h
+++ b/include/rpc/xdr.h
@@ -281,7 +281,7 @@ struct xdr_discrim {
  * These are the "generic" xdr routines.
  */
 __BEGIN_DECLS
-extern bool_t	xdr_void(void);
+extern bool_t	xdr_void(XDR *, void *);
 extern bool_t	xdr_int(XDR *, int *);
 extern bool_t	xdr_u_int(XDR *, u_int *);
 extern bool_t	xdr_long(XDR *, long *);
diff --git a/lib/libc/xdr/xdr.c b/lib/libc/xdr/xdr.c
index 15f80502ea3..bc5e8c54249 100644
--- a/lib/libc/xdr/xdr.c
+++ b/lib/libc/xdr/xdr.c
@@ -88,13 +88,11 @@ xdr_free(xdrproc_t proc, void *objp)
  * XDR nothing
  */
 bool_t
-xdr_void(void)
+xdr_void(XDR *xdrs __unused, void *ptr __unused)
 {
-
 	return (TRUE);
 }
 
-
 /*
  * XDR integers
  */
diff --git a/sys/rpc/xdr.h b/sys/rpc/xdr.h
index cd57b406934..ac9130f65e3 100644
--- a/sys/rpc/xdr.h
+++ b/sys/rpc/xdr.h
@@ -288,7 +288,7 @@ struct xdr_discrim {
  * These are the "generic" xdr routines.
  */
 __BEGIN_DECLS
-extern bool_t	xdr_void(void);
+extern bool_t	xdr_void(XDR *, void *);
 extern bool_t	xdr_int(XDR *, int *);
 extern bool_t	xdr_u_int(XDR *, u_int *);
 extern bool_t	xdr_long(XDR *, long *);
diff --git a/sys/xdr/xdr.c b/sys/xdr/xdr.c
index af0d28bd65b..605efd52e3a 100644
--- a/sys/xdr/xdr.c
+++ b/sys/xdr/xdr.c
@@ -88,9 +88,8 @@ xdr_free(xdrproc_t proc, void *objp)
  * XDR nothing
  */
 bool_t
-xdr_void(void)
+xdr_void(XDR *xrds __unused, void *ptr __unused)
 {
-
 	return (TRUE);
 }