diff --git a/sys/sys/link_elf.h b/sys/sys/link_elf.h
--- a/sys/sys/link_elf.h
+++ b/sys/sys/link_elf.h
@@ -93,7 +93,7 @@
 __BEGIN_DECLS
 
 typedef int (*__dl_iterate_hdr_callback)(struct dl_phdr_info *, size_t, void *);
-extern int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
+int dl_iterate_phdr(__dl_iterate_hdr_callback, void *);
 int _rtld_addr_phdr(const void *, struct dl_phdr_info *);
 int _rtld_get_stack_prot(void);
 int _rtld_is_dlopened(void *);