diff --git a/gpgmymail b/gpgmymail
index 7aecacd..504d10a 100755
--- a/gpgmymail
+++ b/gpgmymail
@@ -40,7 +40,7 @@ import gnupg
 
 # constants
 DEFAULT_ENCODING='utf-8'  # default is latin-1 which fails w some unicode chars
-CONTENT-TRANSFER-ENCODING_TO_ENCODER_DICT = {
+CTE_TO_ENCODER_DICT = {
     "7bit": email.encoders.encode_7or8bit,
     "8bit": email.encoders.encode_7or8bit,
     "base64": email.encoders.encode_base64,
@@ -69,7 +69,7 @@ def get_encoder_from_msg(msg: email.message.Message) -> function:
     """
     cte = msg.get("Content-Transfer-Encoding")
     if cte:
-        encoder = CONTENT-TRANSFER-ENCODING_TO_ENCODER_DICT.get(cte)
+        encoder = CTE_TO_ENCODER_DICT.get(cte)
     else:
         return DEFAULT_ENCODER
     return encoder if encoder else DEFAULT_ENCODER