diff --git a/config b/config
index fc7a1783..22cf6b0e 100755
--- a/config
+++ b/config
@@ -278,7 +278,7 @@ RXPL=${10}
 TXPL=${11}
 
 #	echo ${14}
-	if [ ( "${14}" = "sim" || "${14}" = "rig" ) && ( "$MODE" = "f" || "$MODE" = "b" || "$MODE" = "j") ] ; then
+	if [ ( "${14}" == "sim" || "${14}" == "rig" ) && ( "$MODE" == "f" || "$MODE" == "b" || "$MODE" == "j") ] ; then
 		echo "Doppler frequency shift is ON but not active in this mode (only APRS, CW, SSTV, and Repeater modes)"
 		echo -n "TX Frequency is: "
 		echo -n ${7}