diff --git a/apps/openmw/mwdialogue/filter.cpp b/apps/openmw/mwdialogue/filter.cpp
index 8e8ac4db5e..c2d0515dd7 100644
--- a/apps/openmw/mwdialogue/filter.cpp
+++ b/apps/openmw/mwdialogue/filter.cpp
@@ -440,6 +440,30 @@ bool MWDialogue::Filter::getSelectStructBoolean (const SelectWrapper& select) co
 
             return Misc::StringUtils::lowerCase (mActor.getCell()->mCell->mName)!=select.getName();
 
+        case SelectWrapper::Function_NotLocal:
+        {
+            std::string scriptName = MWWorld::Class::get (mActor).getScript (mActor);
+
+            if (scriptName.empty())
+                // This actor has no attached script, so there is no local variable
+                return true;
+
+            const ESM::Script *script =
+                MWBase::Environment::get().getWorld()->getStore().get<ESM::Script>().find (scriptName);
+
+            std::string name = select.getName();
+
+            int i = 0;
+            for (; i < script->mVarNames.size(); ++i)
+                if (Misc::StringUtils::lowerCase(script->mVarNames[i]) == name)
+                    break;
+
+            if (i >= script->mVarNames.size())
+                return true; // script does not have a variable of this name
+
+            return false;
+        }
+
         case SelectWrapper::Function_SameGender:
 
             return (player.get<ESM::NPC>()->mBase->mFlags & ESM::NPC::Female)==
diff --git a/apps/openmw/mwdialogue/selectwrapper.cpp b/apps/openmw/mwdialogue/selectwrapper.cpp
index 81a4153601..d48a06323e 100644
--- a/apps/openmw/mwdialogue/selectwrapper.cpp
+++ b/apps/openmw/mwdialogue/selectwrapper.cpp
@@ -117,7 +117,7 @@ MWDialogue::SelectWrapper::Function MWDialogue::SelectWrapper::getFunction() con
         case '9': return Function_NotClass;
         case 'A': return Function_NotRace;
         case 'B': return Function_NotCell;
-        case 'C': return Function_Local;
+        case 'C': return Function_NotLocal;
     }
 
     return Function_None;
@@ -233,7 +233,7 @@ MWDialogue::SelectWrapper::Type MWDialogue::SelectWrapper::getType() const
     static const Function invertedBooleanFunctions[] =
     {
         Function_NotId, Function_NotFaction, Function_NotClass,
-        Function_NotRace, Function_NotCell,
+        Function_NotRace, Function_NotCell, Function_NotLocal,
         Function_None // end marker
     };
 
diff --git a/apps/openmw/mwdialogue/selectwrapper.hpp b/apps/openmw/mwdialogue/selectwrapper.hpp
index 0548c60cbb..f4bc898a4b 100644
--- a/apps/openmw/mwdialogue/selectwrapper.hpp
+++ b/apps/openmw/mwdialogue/selectwrapper.hpp
@@ -22,6 +22,7 @@ namespace MWDialogue
                 Function_NotClass,
                 Function_NotRace,
                 Function_NotCell,
+                Function_NotLocal,
                 Function_Local,
                 Function_Global,
                 Function_SameGender, Function_SameRace, Function_SameFaction,