diff --git a/src/osgPlugins/OpenFlight/AncillaryRecords.cpp b/src/osgPlugins/OpenFlight/AncillaryRecords.cpp
index 210ae31c1..6230c198d 100644
--- a/src/osgPlugins/OpenFlight/AncillaryRecords.cpp
+++ b/src/osgPlugins/OpenFlight/AncillaryRecords.cpp
@@ -27,7 +27,7 @@ class Comment : public Record
 
         virtual ~Comment() {}
 
-        virtual void readRecord(RecordInputStream& in, Document& document)
+        virtual void readRecord(RecordInputStream& in, Document& /*document*/)
         {
             std::streamsize size = in.getRecordSize();
             std::string comment = in.readString(size-4);
@@ -54,7 +54,7 @@ class LongID : public Record
 
         virtual ~LongID() {}
 
-        virtual void readRecord(RecordInputStream& in, Document& document)
+        virtual void readRecord(RecordInputStream& in, Document& /*document*/)
         {
             std::streamsize size = in.getRecordSize();
             std::string id = in.readString(size-4);
diff --git a/src/osgPlugins/OpenFlight/ReaderWriterFLT.cpp b/src/osgPlugins/OpenFlight/ReaderWriterFLT.cpp
index 5cd66ff64..faed2217c 100644
--- a/src/osgPlugins/OpenFlight/ReaderWriterFLT.cpp
+++ b/src/osgPlugins/OpenFlight/ReaderWriterFLT.cpp
@@ -220,7 +220,7 @@ class FLTReaderWriter : public ReaderWriter
             return WriteResult::FILE_NOT_HANDLED;
         }
 
-        virtual WriteResult writeNode(const Node& node,std::ostream& fout, const osgDB::ReaderWriter::Options* options) const
+        virtual WriteResult writeNode(const Node& /*node*/,std::ostream& /*fout*/, const osgDB::ReaderWriter::Options* /*options*/) const
         {
             return WriteResult::FILE_NOT_HANDLED;
 
diff --git a/src/osgPlugins/OpenFlight/Record.cpp b/src/osgPlugins/OpenFlight/Record.cpp
index 991521254..9bb702c00 100644
--- a/src/osgPlugins/OpenFlight/Record.cpp
+++ b/src/osgPlugins/OpenFlight/Record.cpp
@@ -40,7 +40,7 @@ void Record::read(RecordInputStream& in, Document& document)
 }
 
 
-void Record::readRecord(RecordInputStream& in, Document& document)
+void Record::readRecord(RecordInputStream& /*in*/, Document& /*document*/)
 {
 }
 
diff --git a/src/osgPlugins/OpenFlight/Record.h b/src/osgPlugins/OpenFlight/Record.h
index 1f0089537..ce1152650 100644
--- a/src/osgPlugins/OpenFlight/Record.h
+++ b/src/osgPlugins/OpenFlight/Record.h
@@ -66,14 +66,14 @@ public:
     virtual void read(RecordInputStream& in, Document& document);
 
     // Ancillary operations
-    virtual void setID(const std::string& id) {}
-    virtual void setComment(const std::string& comment) {}
-    virtual void setMatrix(osg::Matrix& matrix) {}
-    virtual void setMultitexture(osg::StateSet& multitexture) {}
-    virtual void addChild(osg::Node& child) {}
-    virtual void addVertex(Vertex& vertex) {}
-    virtual void addVertexUV(int layer,const osg::Vec2& uv) {}
-    virtual void addMorphVertex(Vertex& vertex0, Vertex& vertex100) {}
+    virtual void setID(const std::string& /*id*/) {}
+    virtual void setComment(const std::string& /*comment*/) {}
+    virtual void setMatrix(osg::Matrix& /*matrix*/) {}
+    virtual void setMultitexture(osg::StateSet& /*multitexture*/) {}
+    virtual void addChild(osg::Node& /*child*/) {}
+    virtual void addVertex(Vertex& /*vertex*/) {}
+    virtual void addVertexUV(int /*layer*/,const osg::Vec2& /*uv*/) {}
+    virtual void addMorphVertex(Vertex& /*vertex0*/, Vertex& /*vertex100*/) {}
 
     void setNumberOfReplications(int num) { _numberOfReplications = num; }