diff --git a/apps/opencs/view/world/scripthighlighter.cpp b/apps/opencs/view/world/scripthighlighter.cpp
index 288a3d12ac..f06d5542e6 100644
--- a/apps/opencs/view/world/scripthighlighter.cpp
+++ b/apps/opencs/view/world/scripthighlighter.cpp
@@ -4,6 +4,7 @@
 #include <sstream>
 
 #include <components/compiler/scanner.hpp>
+#include <components/compiler/extensions0.hpp>
 
 bool CSVWorld::ScriptHighlighter::parseInt (int value, const Compiler::TokenLoc& loc,
     Compiler::Scanner& scanner)
@@ -101,6 +102,10 @@ CSVWorld::ScriptHighlighter::ScriptHighlighter (QTextDocument *parent)
         format.setForeground (Qt::green);
         mScheme.insert (std::make_pair (Type_Comment, format));
     }
+
+    // configure compiler
+    Compiler::registerExtensions (mExtensions);
+    mContext.setExtensions (&mExtensions);
 }
 
 void CSVWorld::ScriptHighlighter::highlightBlock (const QString& text)
diff --git a/apps/opencs/view/world/scripthighlighter.hpp b/apps/opencs/view/world/scripthighlighter.hpp
index 3ef6978097..406935b8d0 100644
--- a/apps/opencs/view/world/scripthighlighter.hpp
+++ b/apps/opencs/view/world/scripthighlighter.hpp
@@ -7,6 +7,7 @@
 
 #include <components/compiler/nullerrorhandler.hpp>
 #include <components/compiler/parser.hpp>
+#include <components/compiler/extensions.hpp>
 
 #include "../../model/world/scriptcontext.hpp"
 
@@ -29,6 +30,7 @@ namespace CSVWorld
         private:
 
             Compiler::NullErrorHandler mErrorHandler;
+            Compiler::Extensions mExtensions;
             CSMWorld::ScriptContext mContext;
             std::map<Type, QTextCharFormat> mScheme;