diff --git a/scapy/asn1/ber.py b/scapy/asn1/ber.py
index c2b0cf3a5..deadf770f 100644
--- a/scapy/asn1/ber.py
+++ b/scapy/asn1/ber.py
@@ -337,7 +337,8 @@ class BERcodec_STRING(BERcodec_Object):
     tag = ASN1_Class_UNIVERSAL.STRING
     @classmethod
     def enc(cls,s):
-        return chb(hash(cls.tag))+BER_len_enc(len(s))+raw(s) # Be sure we are encoding bytes
+        s = raw(s)
+        return chb(hash(cls.tag))+BER_len_enc(len(s))+s  # Be sure we are encoding bytes
     @classmethod
     def do_dec(cls, s, context=None, safe=False):
         l,s,t = cls.check_type_check_len(s)