diff --git a/apps/openmw/mwdialogue/filter.cpp b/apps/openmw/mwdialogue/filter.cpp
index 9f31fdda6..37a84b287 100644
--- a/apps/openmw/mwdialogue/filter.cpp
+++ b/apps/openmw/mwdialogue/filter.cpp
@@ -159,6 +159,39 @@ bool MWDialogue::Filter::testDisposition (const ESM::DialInfo& info, bool invert
                   : (actorDisposition >= info.mData.mDisposition);
 }
 
+bool MWDialogue::Filter::testFunctionLocal(const MWDialogue::SelectWrapper& select) const
+{
+    std::string scriptName = mActor.getClass().getScript (mActor);
+
+    if (scriptName.empty())
+        return false; // no script
+
+    std::string name = Misc::StringUtils::lowerCase (select.getName());
+
+    const Compiler::Locals& localDefs =
+        MWBase::Environment::get().getScriptManager()->getLocals (scriptName);
+
+    char type = localDefs.getType (name);
+
+    if (type==' ')
+        return false; // script does not have a variable of this name.
+
+    int index = localDefs.getIndex (name);
+    if (index < 0)
+        return false; // shouldn't happen, we checked that variable has a type above, so must exist
+
+    const MWScript::Locals& locals = mActor.getRefData().getLocals();
+
+    switch (type)
+    {
+        case 's': return select.selectCompare (static_cast<int> (locals.mShorts[index]));
+        case 'l': return select.selectCompare (locals.mLongs[index]);
+        case 'f': return select.selectCompare (locals.mFloats[index]);
+    }
+
+    throw std::logic_error ("unknown local variable type in dialogue filter");
+}
+
 bool MWDialogue::Filter::testSelectStruct (const SelectWrapper& select) const
 {
     if (select.isNpcOnly() && (mActor.getTypeName() != typeid (ESM::NPC).name()))
@@ -200,35 +233,12 @@ bool MWDialogue::Filter::testSelectStructNumeric (const SelectWrapper& select) c
 
         case SelectWrapper::Function_Local:
         {
-            std::string scriptName = mActor.getClass().getScript (mActor);
-
-            if (scriptName.empty())
-                return false; // no script
-
-            std::string name = Misc::StringUtils::lowerCase (select.getName());
-
-            const Compiler::Locals& localDefs =
-                MWBase::Environment::get().getScriptManager()->getLocals (scriptName);
-
-            char type = localDefs.getType (name);
-
-            if (type==' ')
-                return false; // script does not have a variable of this name.
-
-            int index = localDefs.getIndex (name);
-            if (index < 0)
-                return false; // shouldn't happen, we checked that variable has a type above, so must exist
-
-            const MWScript::Locals& locals = mActor.getRefData().getLocals();
-
-            switch (type)
-            {
-                case 's': return select.selectCompare (static_cast<int> (locals.mShorts[index]));
-                case 'l': return select.selectCompare (locals.mLongs[index]);
-                case 'f': return select.selectCompare (locals.mFloats[index]);
-            }
+            return testFunctionLocal(select);
+        }
 
-            throw std::logic_error ("unknown local variable type in dialogue filter");
+        case SelectWrapper::Function_NotLocal:
+        {
+            return !testFunctionLocal(select);
         }
 
         case SelectWrapper::Function_PcHealthPercent:
@@ -472,20 +482,6 @@ bool MWDialogue::Filter::getSelectStructBoolean (const SelectWrapper& select) co
             return !Misc::StringUtils::ciEqual(MWBase::Environment::get().getWorld()->getCellName(mActor.getCell())
                                                , select.getName());
 
-        case SelectWrapper::Function_NotLocal:
-        {
-            std::string scriptName = mActor.getClass().getScript (mActor);
-
-            if (scriptName.empty())
-                // This actor has no attached script, so there is no local variable
-                return true;
-
-            const Compiler::Locals& localDefs =
-                MWBase::Environment::get().getScriptManager()->getLocals (scriptName);
-
-            return localDefs.getIndex (Misc::StringUtils::lowerCase (select.getName()))==-1;
-        }
-
         case SelectWrapper::Function_SameGender:
 
             return (player.get<ESM::NPC>()->mBase->mFlags & ESM::NPC::Female)==
diff --git a/apps/openmw/mwdialogue/filter.hpp b/apps/openmw/mwdialogue/filter.hpp
index d41b7aa1e..4e2ebe6e5 100644
--- a/apps/openmw/mwdialogue/filter.hpp
+++ b/apps/openmw/mwdialogue/filter.hpp
@@ -33,6 +33,8 @@ namespace MWDialogue
             bool testDisposition (const ESM::DialInfo& info, bool invert=false) const;
             ///< Is the actor disposition toward the player high enough (or low enough, if \a invert is true)?
 
+            bool testFunctionLocal(const SelectWrapper& select) const;
+
             bool testSelectStruct (const SelectWrapper& select) const;
 
             bool testSelectStructNumeric (const SelectWrapper& select) const;
diff --git a/apps/openmw/mwdialogue/selectwrapper.cpp b/apps/openmw/mwdialogue/selectwrapper.cpp
index 68c88e943..793963e48 100644
--- a/apps/openmw/mwdialogue/selectwrapper.cpp
+++ b/apps/openmw/mwdialogue/selectwrapper.cpp
@@ -210,7 +210,7 @@ MWDialogue::SelectWrapper::Type MWDialogue::SelectWrapper::getType() const
 
     static const Function numericFunctions[] =
     {
-        Function_Global, Function_Local,
+        Function_Global, Function_Local, Function_NotLocal,
         Function_PcDynamicStat, Function_PcHealthPercent,
         Function_HealthPercent,
         Function_None // end marker
@@ -232,7 +232,7 @@ MWDialogue::SelectWrapper::Type MWDialogue::SelectWrapper::getType() const
     static const Function invertedBooleanFunctions[] =
     {
         Function_NotId, Function_NotFaction, Function_NotClass,
-        Function_NotRace, Function_NotCell, Function_NotLocal,
+        Function_NotRace, Function_NotCell,
         Function_None // end marker
     };