diff --git a/calibre-plugin/plugin-defaults.ini b/calibre-plugin/plugin-defaults.ini
index c4c19c8..517c33e 100644
--- a/calibre-plugin/plugin-defaults.ini
+++ b/calibre-plugin/plugin-defaults.ini
@@ -1303,9 +1303,18 @@ extracategories:Lord of the Rings
 extracategories:Harry Potter
 
 [mcstories.com]
+## Some sites do not require a login, but do require the user to
+## confirm they are adult for adult content.  In commandline version,
+## this should go in your personal.ini, not defaults.ini.
+#is_adult:true
+
 ## Clear FanFiction from defaults, site is original fiction.
 extratags:Erotica
 
+extra_valid_entries:eroticatags
+eroticatags_label:Erotica Tags
+extra_titlepage_entries: eroticatags
+
 [merlinfic.dtwins.co.uk]
 ## Some sites require login (or login for some rated stories) The
 ## program can prompt you, or you can save it in config.  In
diff --git a/fanficfare/adapters/adapter_mcstoriescom.py b/fanficfare/adapters/adapter_mcstoriescom.py
index ba8b60d..8684dac 100644
--- a/fanficfare/adapters/adapter_mcstoriescom.py
+++ b/fanficfare/adapters/adapter_mcstoriescom.py
@@ -118,7 +118,7 @@ class MCStoriesComSiteAdapter(BaseSiteAdapter):
         # Tags
         codesDiv = soup1.find('div', class_="storyCodes")
         for a in codesDiv.findAll('a'):
-            self.story.addToList('category', a.text)
+            self.story.addToList('eroticatags', a.text)
 
         # Publish and update dates
         publishdate = None
diff --git a/fanficfare/defaults.ini b/fanficfare/defaults.ini
index 1a1cd15..e103155 100644
--- a/fanficfare/defaults.ini
+++ b/fanficfare/defaults.ini
@@ -1291,9 +1291,18 @@ extracategories:Lord of the Rings
 extracategories:Harry Potter
 
 [mcstories.com]
+## Some sites do not require a login, but do require the user to
+## confirm they are adult for adult content.  In commandline version,
+## this should go in your personal.ini, not defaults.ini.
+#is_adult:true
+
 ## Clear FanFiction from defaults, site is original fiction.
 extratags:Erotica
 
+extra_valid_entries:eroticatags
+eroticatags_label:Erotica Tags
+extra_titlepage_entries: eroticatags
+
 [merlinfic.dtwins.co.uk]
 ## Some sites require login (or login for some rated stories) The
 ## program can prompt you, or you can save it in config.  In