diff --git a/src/environments/groupthm/groupthm.dtx b/src/environments/groupthm/groupthm.dtx
index 05781b2..7c21ddf 100644
--- a/src/environments/groupthm/groupthm.dtx
+++ b/src/environments/groupthm/groupthm.dtx
@@ -2957,6 +2957,15 @@
     \cs_set_eq:NN \@@_cache:n \use_none:n
 %    \end{macrocode}
 % \end{macro}
+%
+%
+% \begin{macro}{\@@_cache_slow:n}
+%		 
+%
+%    \begin{macrocode}
+    \cs_set_eq:NN \@@_cache_slow:n \use_none:n
+%    \end{macrocode}
+% \end{macro}
 % 
 % 
 % \begin{macro}{\@@_lazy:n}