diff --git a/src/ser_posix.c b/src/ser_posix.c
index 50bd2cfe..2c5d45b5 100644
--- a/src/ser_posix.c
+++ b/src/ser_posix.c
@@ -99,7 +99,7 @@ static speed_t serial_baud_lookup(long baud, bool *nonstandard)
    * If a non-standard BAUD rate is used, issue
    * a warning (if we are verbose) and return the raw rate
    */
-  avrdude_message(MSG_NOTICE, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
+  avrdude_message(MSG_NOTICE, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld\n",
               progname, baud);
 
   *nonstandard = true;