diff --git a/src/option.c b/src/option.c
index 3e35144..79a6f92 100644
--- a/src/option.c
+++ b/src/option.c
@@ -2074,6 +2074,9 @@ zenity_text_post_callback (GOptionContext *context,
     if (zenity_text_font) 
       zenity_option_error (zenity_option_get_name (text_options, &zenity_text_font),
                            ERROR_SUPPORT);
+    if (zenity_text_enable_html)
+      zenity_option_error (zenity_option_get_name (text_options, &zenity_text_enable_html),
+                           ERROR_SUPPORT);
   }
   return TRUE;
 }