diff --git a/lnxrouter b/lnxrouter
index 7f3001e..1126d34 100755
--- a/lnxrouter
+++ b/lnxrouter
@@ -676,7 +676,7 @@ can_transmit_to_channel() {
     fi
 
     if [[ $USE_IWCONFIG -eq 0 ]]; then
-        CHANNEL_INFO=$(get_adapter_info "${IFACE}" | grep -E " ${CHANNEL_FREQ_FILTER}[0-9]+(\.[0-9]+){0,1} MHz \[${CHANNEL_NUM}\]")
+        CHANNEL_INFO=$(get_adapter_info "${IFACE}" | grep -E " ${CHANNEL_FREQ_FILTER}[0-9]{2}(\.[0-9]+){0,1} MHz \[${CHANNEL_NUM}\]")
         [[ -z "${CHANNEL_INFO}" ]] && return 1
         [[ "${CHANNEL_INFO}" == *no\ IR* ]] && return 2
         [[ "${CHANNEL_INFO}" == *disabled* ]] && return 3