diff --git a/library/md2.c b/library/md2.c
index de64d70..4616b83 100644
--- a/library/md2.c
+++ b/library/md2.c
@@ -194,7 +194,7 @@
     md2_starts( &ctx );
 
     while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
-        md2_update( &ctx, buf, (int) n );
+        md2_update( &ctx, buf, n );
 
     md2_finish( &ctx, output );