diff --git a/linker/linker_phdr.h b/linker/linker_phdr.h
index 430c6ec..611f1a7 100644
--- a/linker/linker_phdr.h
+++ b/linker/linker_phdr.h
@@ -89,6 +89,11 @@
 
 int phdr_table_protect_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias);
 
+int phdr_table_serialize_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
+                                   int fd);
+
+int phdr_table_map_gnu_relro(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,
+                             int fd);
 
 #if defined(__arm__)
 int phdr_table_get_arm_exidx(const ElfW(Phdr)* phdr_table, size_t phdr_count, ElfW(Addr) load_bias,