diff --git a/src/ssn/extractFileStream.ts b/src/ssn/extractFileStream.ts
index a934d85..7298329 100644
--- a/src/ssn/extractFileStream.ts
+++ b/src/ssn/extractFileStream.ts
@@ -31,9 +31,8 @@ export default function extractFileStream(file: ISsnFileEntry, inputStream: stre
 
   let curStream = inputStream;
 
-  const storedSize = (file.decryptionKeys !== undefined) ? (12 + file.compressedSize) : file.compressedSize;
   //set max length (including random 12 byte encryption header)
-  const maxLength = streamSetMaxLength(curStream, storedSize);
+  const maxLength = streamSetMaxLength(curStream, file.compressedSize);
   curStream = maxLength;
 
   //pipe into decryption if file is encrypted