diff --git a/linker/linker_phdr.h b/linker/linker_phdr.h
index f7b1caf..c359cca 100644
--- a/linker/linker_phdr.h
+++ b/linker/linker_phdr.h
@@ -64,6 +64,7 @@
   bool LoadSegments();
   bool FindPhdr();
   bool CheckPhdr(ElfW(Addr));
+  bool CheckFileRange(ElfW(Addr) offset, size_t size);
 
   bool did_read_;
   bool did_load_;