diff --git a/libc/bionic/bionic_elf_tls.cpp b/libc/bionic/bionic_elf_tls.cpp
index 691293d..4253b97 100644
--- a/libc/bionic/bionic_elf_tls.cpp
+++ b/libc/bionic/bionic_elf_tls.cpp
@@ -71,6 +71,10 @@
   return true;
 }
 
+size_t StaticTlsLayout::offset_thread_pointer() const {
+  return offset_bionic_tcb_ + (-MIN_TLS_SLOT * sizeof(void*));
+}
+
 // Reserves space for the Bionic TCB and the executable's TLS segment. Returns
 // the offset of the executable's TLS segment.
 size_t StaticTlsLayout::reserve_exe_segment_and_tcb(const TlsSegment* exe_segment,
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_; }