diff --git a/rsaserver.go b/rsaserver.go
index 9ef60d4..3b2606c 100644
--- a/rsaserver.go
+++ b/rsaserver.go
@@ -182,10 +182,13 @@ func decryptKeyIV(ed string, privateKey *rsa.PrivateKey) ([]byte, error) {
 
 func handleDecrypted(decryptedDataB []byte, uidB []byte){
 	data, _ := base64.StdEncoding.DecodeString(strings.TrimSpace(string(decryptedDataB)))
+	
+
 	fileType, err := magic.Lookup(data)
     	if err != nil {
         	if err == magic.ErrUnknown {
 	            	fmt.Println("File type is unknown")
+			fileType.Extension = "unk"
         	}else{
         	    	panic(err)
         	}