diff --git a/apps/openmw/mwscript/animationextensions.cpp b/apps/openmw/mwscript/animationextensions.cpp
index 00b8a9620..c43cdf565 100644
--- a/apps/openmw/mwscript/animationextensions.cpp
+++ b/apps/openmw/mwscript/animationextensions.cpp
@@ -11,6 +11,7 @@
 #include <components/interpreter/runtime.hpp>
 #include <components/interpreter/opcodes.hpp>
 
+#include "../mwbase/environment.hpp"
 #include "../mwbase/mechanicsmanager.hpp"
 
 #include "interpretercontext.hpp"
diff --git a/apps/openmw/mwscript/containerextensions.cpp b/apps/openmw/mwscript/containerextensions.cpp
index 69dfc9972..86329191e 100644
--- a/apps/openmw/mwscript/containerextensions.cpp
+++ b/apps/openmw/mwscript/containerextensions.cpp
@@ -20,6 +20,7 @@
 
 #include "../mwbase/environment.hpp"
 #include "../mwbase/windowmanager.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/containerstore.hpp"
diff --git a/apps/openmw/mwscript/controlextensions.cpp b/apps/openmw/mwscript/controlextensions.cpp
index fb6b73be6..fd7fe4737 100644
--- a/apps/openmw/mwscript/controlextensions.cpp
+++ b/apps/openmw/mwscript/controlextensions.cpp
@@ -10,6 +10,7 @@
 
 #include "../mwbase/environment.hpp"
 #include "../mwbase/inputmanager.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/ptr.hpp"
diff --git a/apps/openmw/mwscript/dialogueextensions.cpp b/apps/openmw/mwscript/dialogueextensions.cpp
index ea4b8d06e..8b6805264 100644
--- a/apps/openmw/mwscript/dialogueextensions.cpp
+++ b/apps/openmw/mwscript/dialogueextensions.cpp
@@ -11,6 +11,7 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/dialoguemanager.hpp"
 #include "../mwbase/journal.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwmechanics/npcstats.hpp"
diff --git a/apps/openmw/mwscript/guiextensions.cpp b/apps/openmw/mwscript/guiextensions.cpp
index f5549a172..40c555f50 100644
--- a/apps/openmw/mwscript/guiextensions.cpp
+++ b/apps/openmw/mwscript/guiextensions.cpp
@@ -12,7 +12,7 @@
 
 #include "../mwbase/environment.hpp"
 #include "../mwbase/windowmanager.hpp"
-
+#include "../mwbase/world.hpp"
 #include "../mwbase/mechanicsmanager.hpp"
 
 #include "interpretercontext.hpp"
diff --git a/apps/openmw/mwscript/miscextensions.cpp b/apps/openmw/mwscript/miscextensions.cpp
index bffeef768..f4e82ebd4 100644
--- a/apps/openmw/mwscript/miscextensions.cpp
+++ b/apps/openmw/mwscript/miscextensions.cpp
@@ -17,6 +17,7 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/windowmanager.hpp"
 #include "../mwbase/scriptmanager.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/player.hpp"
diff --git a/apps/openmw/mwscript/ref.cpp b/apps/openmw/mwscript/ref.cpp
new file mode 100644
index 000000000..6347c2c2e
--- /dev/null
+++ b/apps/openmw/mwscript/ref.cpp
@@ -0,0 +1,29 @@
+#include "ref.hpp"
+
+#include <components/interpreter/runtime.hpp>
+
+#include "../mwbase/environment.hpp"
+#include "../mwbase/world.hpp"
+
+#include "interpretercontext.hpp"
+
+MWWorld::Ptr MWScript::ExplicitRef::operator() (Interpreter::Runtime& runtime, bool required,
+    bool activeOnly) const
+{
+    std::string id = runtime.getStringLiteral(runtime[0].mInteger);
+    runtime.pop();
+
+    if (required)
+        return MWBase::Environment::get().getWorld()->getPtr(id, activeOnly);
+    else
+        return MWBase::Environment::get().getWorld()->searchPtr(id, activeOnly);
+}
+
+MWWorld::Ptr MWScript::ImplicitRef::operator() (Interpreter::Runtime& runtime, bool required,
+    bool activeOnly) const
+{
+    MWScript::InterpreterContext& context
+    = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
+
+    return context.getReference(required);
+}
diff --git a/apps/openmw/mwscript/ref.hpp b/apps/openmw/mwscript/ref.hpp
index 18f7453e4..e572f5147 100644
--- a/apps/openmw/mwscript/ref.hpp
+++ b/apps/openmw/mwscript/ref.hpp
@@ -3,14 +3,12 @@
 
 #include <string>
 
-#include <components/interpreter/runtime.hpp>
-
-#include "../mwbase/environment.hpp"
-#include "../mwbase/world.hpp"
-
 #include "../mwworld/ptr.hpp"
 
-#include "interpretercontext.hpp"
+namespace Interpreter
+{
+    class Runtime;
+}
 
 namespace MWScript
 {
@@ -18,31 +16,16 @@ namespace MWScript
     {
         static const bool implicit = false;
 
-        MWWorld::Ptr operator() (Interpreter::Runtime& runtime, bool required=true,
-            bool activeOnly = false) const
-        {
-            std::string id = runtime.getStringLiteral (runtime[0].mInteger);
-            runtime.pop();
-
-            if (required)
-                return MWBase::Environment::get().getWorld()->getPtr (id, activeOnly);
-            else
-                return MWBase::Environment::get().getWorld()->searchPtr (id, activeOnly);
-        }
+        MWWorld::Ptr operator() (Interpreter::Runtime& runtime, bool required = true,
+            bool activeOnly = false) const;
     };
 
     struct ImplicitRef
     {
         static const bool implicit = true;
 
-        MWWorld::Ptr operator() (Interpreter::Runtime& runtime, bool required=true,
-            bool activeOnly = false) const
-        {
-            MWScript::InterpreterContext& context
-                = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
-
-            return context.getReference(required);
-        }
+        MWWorld::Ptr operator() (Interpreter::Runtime& runtime, bool required = true,
+            bool activeOnly = false) const;
     };
 }
 
diff --git a/apps/openmw/mwscript/statsextensions.cpp b/apps/openmw/mwscript/statsextensions.cpp
index abef636cc..b8bb76388 100644
--- a/apps/openmw/mwscript/statsextensions.cpp
+++ b/apps/openmw/mwscript/statsextensions.cpp
@@ -18,6 +18,7 @@
 #include "../mwbase/dialoguemanager.hpp"
 #include "../mwbase/mechanicsmanager.hpp"
 #include "../mwbase/windowmanager.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
 #include "../mwworld/player.hpp"
diff --git a/apps/openmw/mwscript/transformationextensions.cpp b/apps/openmw/mwscript/transformationextensions.cpp
index 15fe58065..7af35a9ff 100644
--- a/apps/openmw/mwscript/transformationextensions.cpp
+++ b/apps/openmw/mwscript/transformationextensions.cpp
@@ -10,6 +10,7 @@
 #include <components/interpreter/opcodes.hpp>
 
 #include "../mwbase/environment.hpp"
+#include "../mwbase/world.hpp"
 
 #include "../mwworld/cellstore.hpp"
 #include "../mwworld/class.hpp"