diff --git a/src/core/operations/Compress.js b/src/core/operations/Compress.js
index 22414247..2f4fe653 100755
--- a/src/core/operations/Compress.js
+++ b/src/core/operations/Compress.js
@@ -267,6 +267,7 @@ const Compress = {
 
         let regexStr = /1f8b080[0-8][0-9a-f]{12}/;
         let gzipPos = input.search(regexStr);
+        if (gzipPos == -1) {return Utils.hexToByteArray(input);}
         let plainData = input.substr(0, gzipPos);
         let gzipData = input.substr(gzipPos);