diff --git a/include/dwarf.h b/include/dwarf.h
index 71e9df60..169f739e 100644
--- a/include/dwarf.h
+++ b/include/dwarf.h
@@ -37,6 +37,13 @@ struct elf_dyn_info;
 # include "config.h"
 #endif
 
+#ifdef HAVE___THREAD
+  /* For now, turn off per-thread caching.  It uses up too much TLS
+     memory per thread even when the thread never uses libunwind at
+     all.  */
+# undef HAVE___THREAD
+#endif
+
 #ifndef UNW_REMOTE_ONLY
   #if defined(HAVE_LINK_H)
     #include <link.h>