diff --git a/apps/openmw/mwmechanics/spells.cpp b/apps/openmw/mwmechanics/spells.cpp
index 04225b43eb..b1829964be 100644
--- a/apps/openmw/mwmechanics/spells.cpp
+++ b/apps/openmw/mwmechanics/spells.cpp
@@ -143,6 +143,20 @@ namespace MWMechanics
         return mSelectedSpell;
     }
 
+    bool Spells::isSpellActive(const std::string &id) const
+    {
+        TContainer::const_iterator found = mSpells.find(id);
+        if (found != mSpells.end())
+        {
+            const ESM::Spell *spell =
+                MWBase::Environment::get().getWorld()->getStore().get<ESM::Spell>().find (id);
+
+            return (spell->mData.mType==ESM::Spell::ST_Ability || spell->mData.mType==ESM::Spell::ST_Blight ||
+                spell->mData.mType==ESM::Spell::ST_Disease || spell->mData.mType==ESM::Spell::ST_Curse);
+        }
+        return false;
+    }
+
     bool Spells::hasCommonDisease() const
     {
         for (TIterator iter = mSpells.begin(); iter!=mSpells.end(); ++iter)
diff --git a/apps/openmw/mwmechanics/spells.hpp b/apps/openmw/mwmechanics/spells.hpp
index 064b2c1e5d..6b41499395 100644
--- a/apps/openmw/mwmechanics/spells.hpp
+++ b/apps/openmw/mwmechanics/spells.hpp
@@ -98,6 +98,9 @@ namespace MWMechanics
             const std::string getSelectedSpell() const;
             ///< May return an empty string.
 
+            bool isSpellActive(const std::string& id) const;
+            ///< Are we under the effects of the given spell ID?
+
             bool hasCommonDisease() const;
 
             bool hasBlightDisease() const;
diff --git a/apps/openmw/mwscript/miscextensions.cpp b/apps/openmw/mwscript/miscextensions.cpp
index 29f586a653..38106340ae 100644
--- a/apps/openmw/mwscript/miscextensions.cpp
+++ b/apps/openmw/mwscript/miscextensions.cpp
@@ -595,7 +595,8 @@ namespace MWScript
                     std::string id = runtime.getStringLiteral(runtime[0].mInteger);
                     runtime.pop();
 
-                    runtime.push(ptr.getClass().getCreatureStats(ptr).getActiveSpells().isSpellActive(id));
+                    const MWMechanics::CreatureStats& stats = ptr.getClass().getCreatureStats(ptr);
+                    runtime.push(stats.getActiveSpells().isSpellActive(id) || stats.getSpells().isSpellActive(id));
                 }
         };