diff --git a/user_guide_src/source/general/reserved_names.rst b/user_guide_src/source/general/reserved_names.rst
index a7b0c34..5d745cb 100644
--- a/user_guide_src/source/general/reserved_names.rst
+++ b/user_guide_src/source/general/reserved_names.rst
@@ -75,6 +75,7 @@
 -  FOPEN_READ_WRITE_CREATE
 -  FOPEN_WRITE_CREATE_STRICT
 -  FOPEN_READ_WRITE_CREATE_STRICT
+-  SHOW_DEBUG_BACKTRACE
 -  EXIT_SUCCESS
 -  EXIT_ERROR
 -  EXIT_CONFIG