diff --git a/src/osgPlugins/osg/BinaryStreamOperator.h b/src/osgPlugins/osg/BinaryStreamOperator.h
index 93c721d0d..3505dfb56 100644
--- a/src/osgPlugins/osg/BinaryStreamOperator.h
+++ b/src/osgPlugins/osg/BinaryStreamOperator.h
@@ -263,8 +263,9 @@ public:
     {
         if ( _supportBinaryBrackets && _beginPositions.size()>0 )
         {
-            std::streampos pos = _beginPositions.back() + _blockSizes.back();
-            _in->seekg( pos, std::ios_base::beg );
+            std::streampos position(_beginPositions.back());
+            position += _blockSizes.back();
+            _in->seekg( position );
             _beginPositions.pop_back();
             _blockSizes.pop_back();
         }
@@ -272,7 +273,7 @@ public:
 
 protected:
     std::vector<std::streampos> _beginPositions;
-    std::vector<std::streampos> _blockSizes;
+    std::vector<int> _blockSizes;
 };
 
 #endif
diff --git a/src/osgPlugins/osga/OSGA_Archive.cpp b/src/osgPlugins/osga/OSGA_Archive.cpp
index 3d3ac7e33..e6ec2fcc4 100644
--- a/src/osgPlugins/osga/OSGA_Archive.cpp
+++ b/src/osgPlugins/osga/OSGA_Archive.cpp
@@ -650,7 +650,7 @@ protected:
         }
 
         if ( newpos<0 || newpos>_numChars ) return -1;
-        if ( (std::streamoff)_streambuf->pubseekpos( STREAM_POS(_startPos+newpos), which) < 0 ) return -1;
+        if ( ARCHIVE_POS(_streambuf->pubseekpos( STREAM_POS(_startPos+newpos), which)) < 0 ) return -1;
         _curPos = newpos;
         return _curPos;
     }