diff --git a/bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/provider/ShellyChannelDefinitions.java b/bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/provider/ShellyChannelDefinitions.java
index 0d27bae8eb24e..999a502a73023 100644
--- a/bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/provider/ShellyChannelDefinitions.java
+++ b/bundles/org.openhab.binding.shelly/src/main/java/org/openhab/binding/shelly/internal/provider/ShellyChannelDefinitions.java
@@ -344,10 +344,10 @@ public static Map<String, Channel> createRelayChannels(final Thing thing, final
         }
 
         // Shelly 1/1PM and Plus 1/1PM Addon
+        int relayNum = getInteger(profile.settings.extSwitch.input0.relayNum);
         addChannel(thing, add,
-                profile.settings.extSwitch != null && profile.settings.extSwitch.input0 != null
-                        && idx == getInteger(profile.settings.extSwitch.input0.relayNum),
-                CHGR_SENSOR, CHANNEL_ESENSOR_INPUT + (profile.settings.extSwitch.input0.relayNum + 1));
+                profile.settings.extSwitch != null && profile.settings.extSwitch.input0 != null && idx == relayNum,
+                CHGR_SENSOR, CHANNEL_ESENSOR_INPUT + (relayNum + 1));
         if (profile.status.extTemperature != null) {
             addChannel(thing, add, profile.status.extTemperature.sensor1 != null, CHGR_SENSOR, CHANNEL_ESENSOR_TEMP1);
             addChannel(thing, add, profile.status.extTemperature.sensor2 != null, CHGR_SENSOR, CHANNEL_ESENSOR_TEMP2);