diff --git a/libc/private/bionic_elf_tls.h b/libc/private/bionic_elf_tls.h
index 94c01e0..09e1958 100644
--- a/libc/private/bionic_elf_tls.h
+++ b/libc/private/bionic_elf_tls.h
@@ -61,6 +61,7 @@
 public:
   size_t offset_bionic_tcb() const { return offset_bionic_tcb_; }
   size_t offset_bionic_tls() const { return offset_bionic_tls_; }
+  size_t offset_thread_pointer() const;
 
   size_t size() const { return offset_; }
   size_t alignment() const { return alignment_; }