diff --git a/src/osgPlugins/osg/BinaryStreamOperator.h b/src/osgPlugins/osg/BinaryStreamOperator.h
index 1f84aa994..93c721d0d 100644
--- a/src/osgPlugins/osg/BinaryStreamOperator.h
+++ b/src/osgPlugins/osg/BinaryStreamOperator.h
@@ -90,13 +90,14 @@ public:
             }
             else if ( mark._name=="}" && _beginPositions.size()>0 )
             {
-                int pos = _out->tellp(), beginPos = _beginPositions.back();
+                std::streampos pos = _out->tellp(), beginPos = _beginPositions.back();
                 _beginPositions.pop_back();
-                _out->seekp( beginPos, std::ios_base::beg );
+                _out->seekp( beginPos );
 
-                int size = pos - beginPos;
+                std::streampos size64 = pos - beginPos;
+                int size = (int) size64;
                 _out->write( (char*)&size, osgDB::INT_SIZE );
-                _out->seekp( pos, std::ios_base::beg );
+                _out->seekp( pos );
             }
         }
     }
@@ -108,7 +109,7 @@ public:
     { writeString( str ); }
     
 protected:
-    std::vector<int> _beginPositions;
+    std::vector<std::streampos> _beginPositions;
 };
 
 class BinaryInputIterator : public osgDB::InputIterator
@@ -262,7 +263,7 @@ public:
     {
         if ( _supportBinaryBrackets && _beginPositions.size()>0 )
         {
-            int pos = _beginPositions.back() + _blockSizes.back();
+            std::streampos pos = _beginPositions.back() + _blockSizes.back();
             _in->seekg( pos, std::ios_base::beg );
             _beginPositions.pop_back();
             _blockSizes.pop_back();
@@ -270,8 +271,8 @@ public:
     }
 
 protected:
-    std::vector<int> _beginPositions;
-    std::vector<int> _blockSizes;
+    std::vector<std::streampos> _beginPositions;
+    std::vector<std::streampos> _blockSizes;
 };
 
 #endif