diff --git a/include/libunwind-aarch64.h b/include/libunwind-aarch64.h
index fe9e83d7..85812e15 100644
--- a/include/libunwind-aarch64.h
+++ b/include/libunwind-aarch64.h
@@ -46,7 +46,7 @@ extern "C" {
    relatively cheap and unwind-state copying is relatively rare, so we
    want to err on making it rather too big than too small.  */
 
-#define UNW_TDEP_CURSOR_LEN     4096
+#define UNW_TDEP_CURSOR_LEN     512
 
 typedef uint64_t unw_word_t;
 typedef int64_t unw_sword_t;