diff --git a/doc/environments/fancythm/fancythm.dtx b/doc/environments/fancythm/fancythm.dtx
index 2f80f74..186332a 100644
--- a/doc/environments/fancythm/fancythm.dtx
+++ b/doc/environments/fancythm/fancythm.dtx
@@ -440,7 +440,7 @@
       {
         \clist_put_right:Nx \l_@@_thmtools_clist
           {
-            mdframed = \tl_use:N \l_@@_key_mdframed_tl
+            mdframed = { style = \tl_use:N \l_@@_key_mdframed_tl }
           }
       }
     \tl_if_eq:NnF \l_@@_key_style_tl { \c_novalue_tl }
@@ -478,6 +478,7 @@
 %    \begin{macrocode}
 \cs_new:Npn \fancythm_new_theorem:nnnn #1 #2 #3 #4
   {
+%    \tl_show:n { new ~ fancy ~ theorem ~ with ~ 1 = '#1', ~ 2='#2', ~ 3='#3', 4='#4'}
     \groupthm_new_family:nnnnn { #1 } { dagger, star } { #3 } { #4 } { #2 }
     \groupthm_new_family_options:nnnn
       { #1 }