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--- a/tool/src/ssdeep/ssdeep.java
+++ b/tool/src/ssdeep/ssdeep.java
@@ -357,9 +357,9 @@
 
     /**
      /// Calculates the SpamSum hash for specified <paramref name="stream"/>.
-
-     @param stream The stream.
+     * @param file
      @return SpamSum signature
+     * @throws java.io.IOException
     */
     public String fuzzy_hash_file(File file) throws IOException
     {
@@ -401,6 +401,9 @@
 
         //stream.Position = filepos;
         stream.seek(filepos);
+        
+        // close the stream
+        stream.close();
 
         return ctx.signature.toString();
     }