diff --git a/apps/opencs/model/tools/referenceablecheck.hpp b/apps/opencs/model/tools/referenceablecheck.hpp
index dbfcd7574f..338983cc70 100644
--- a/apps/opencs/model/tools/referenceablecheck.hpp
+++ b/apps/opencs/model/tools/referenceablecheck.hpp
@@ -11,7 +11,11 @@ namespace CSMTools
     class ReferenceableCheckStage : public CSMDoc::Stage
     {
         public:
-            ReferenceableCheckStage(const CSMWorld::RefIdData& referenceable, const CSMWorld::IdCollection<ESM::Race>& races, const CSMWorld::IdCollection<ESM::Class>& classes, const CSMWorld::IdCollection<ESM::Faction>& factions);
+            ReferenceableCheckStage(const CSMWorld::RefIdData& referenceable,
+				    const CSMWorld::IdCollection<ESM::Race>& races,
+				    const CSMWorld::IdCollection<ESM::Class>& classes,
+				    const CSMWorld::IdCollection<ESM::Faction>& factions);
+
             virtual void perform(int stage, std::vector< std::string >& messages);
             virtual int setup();