diff --git a/lib/smtp.c b/lib/smtp.c
index 185bd4bded54bcb3cb08ba492261a3cb820a1f40..a719ee1c84df90fff5682da85fc72f0745ddb7ec 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -676,7 +676,6 @@ static CURLcode smtp_state_authcram_resp(struct connectdata *conn,
   }
 
   /* Compute digest. */
-  strlen(conn->passwd);
   ctxt = Curl_HMAC_init(Curl_HMAC_MD5,
    (const unsigned char *) conn->passwd, strlen(conn->passwd));