diff --git a/bundles/org.openhab.binding.deconz/src/main/java/org/openhab/binding/deconz/internal/handler/LightThingHandler.java b/bundles/org.openhab.binding.deconz/src/main/java/org/openhab/binding/deconz/internal/handler/LightThingHandler.java
index a22658e7c0015..ca1fdba4b1d87 100644
--- a/bundles/org.openhab.binding.deconz/src/main/java/org/openhab/binding/deconz/internal/handler/LightThingHandler.java
+++ b/bundles/org.openhab.binding.deconz/src/main/java/org/openhab/binding/deconz/internal/handler/LightThingHandler.java
@@ -169,7 +169,6 @@ public void handleCommand(ChannelUID channelUID, Command command) {
                 break;
             case CHANNEL_COLOR_TEMPERATURE:
                 if (command instanceof DecimalType) {
-                    newLightState.colormode = "ct";
                     newLightState.ct = unscaleColorTemperature(((DecimalType) command).doubleValue());
 
                     if (currentOn != null && !currentOn) {