diff --git a/linker/linker_tls.h b/linker/linker_tls.h
index fbb1dcf..87e1f0d 100644
--- a/linker/linker_tls.h
+++ b/linker/linker_tls.h
@@ -30,6 +30,8 @@
 
 #include <stdlib.h>
 
+#include "private/bionic_elf_tls.h"
+
 struct TlsModule;
 struct soinfo;
 
@@ -40,3 +42,24 @@
 void unregister_soinfo_tls(soinfo* si);
 
 const TlsModule& get_tls_module(size_t module_id);
+
+typedef size_t TlsDescResolverFunc(size_t);
+
+struct TlsDescriptor {
+#if defined(__arm__)
+  size_t arg;
+  TlsDescResolverFunc* func;
+#else
+  TlsDescResolverFunc* func;
+  size_t arg;
+#endif
+};
+
+struct TlsDynamicResolverArg {
+  size_t generation;
+  TlsIndex index;
+};
+
+__LIBC_HIDDEN__ extern "C" size_t tlsdesc_resolver_static(size_t);
+__LIBC_HIDDEN__ extern "C" size_t tlsdesc_resolver_dynamic(size_t);
+__LIBC_HIDDEN__ extern "C" size_t tlsdesc_resolver_unresolved_weak(size_t);