diff --git a/libexec/ld.elf_so/Makefile b/libexec/ld.elf_so/Makefile
index b59a01a42731..60cfe8e049ae 100644
--- a/libexec/ld.elf_so/Makefile
+++ b/libexec/ld.elf_so/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.148 2023/10/07 12:15:53 rin Exp $
+#	$NetBSD: Makefile,v 1.149 2024/01/19 19:21:34 christos Exp $
 #
 # NOTE: when changing ld.so, ensure that ldd still compiles.
 #
@@ -111,7 +111,7 @@ BINDIR=		${SHLINKINSTALLDIR}
 CPPFLAGS.tls.c+=	-std=gnu11
 CPPFLAGS+=	-DLIBDIR=\"${LIBDIR}\" -D_PATH_RTLD=\"${BINDIR}/${PROG}\"
 CPPFLAGS+=	-I${.CURDIR} -I. -D_KERNTYPES
-CPPFLAGS+=	-DRTLD_LOADER
+CPPFLAGS+=	-DRTLD_LOADER -D_LIBC_INTERNAL
 CPPFLAGS+=	-DGNU_RELRO
 CPPFLAGS+=	-D_RTLD_SOURCE
 CPPFLAGS+=	-DHAVE_INITFINI_ARRAY
diff --git a/libexec/ld.elf_so/rtld.c b/libexec/ld.elf_so/rtld.c
index 3a7de92b42a7..50dc4a6b6e4f 100644
--- a/libexec/ld.elf_so/rtld.c
+++ b/libexec/ld.elf_so/rtld.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: rtld.c,v 1.216 2023/10/03 09:48:18 martin Exp $	 */
+/*	$NetBSD: rtld.c,v 1.217 2024/01/19 19:21:34 christos Exp $	 */
 
 /*
  * Copyright 1996 John D. Polstra.
@@ -40,7 +40,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: rtld.c,v 1.216 2023/10/03 09:48:18 martin Exp $");
+__RCSID("$NetBSD: rtld.c,v 1.217 2024/01/19 19:21:34 christos Exp $");
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -1550,8 +1550,6 @@ __dl_cxa_refcount(void *addr, ssize_t delta)
 	_rtld_exclusive_exit(&mask);
 }
 
-pid_t __fork(void);
-
 __dso_public pid_t
 __locked_fork(int *my_errno)
 {