diff --git a/tagpdf-struct.dtx b/tagpdf-struct.dtx
index 460b6a09..53a5ba6d 100644
--- a/tagpdf-struct.dtx
+++ b/tagpdf-struct.dtx
@@ -523,7 +523,7 @@
         { g_@@_struct_#1_prop }{#2}{#3}
 %<debug>\prop_gput:cnn { g_@@_struct_debug_#1_prop } {#2} {#3}        
  }
-\cs_generate_variant:Nn \@@_struct_prop_gput:nnn {nne,nee,nno} 
+\cs_generate_variant:Nn \@@_struct_prop_gput:nnn {onn,nne,nee,nno} 
 %</package|debug>
 %    \end{macrocode}
 % \end{macro}