diff --git a/bundles/org.openhab.binding.modbus/src/main/java/org/openhab/binding/modbus/handler/ModbusPollerThingHandler.java b/bundles/org.openhab.binding.modbus/src/main/java/org/openhab/binding/modbus/handler/ModbusPollerThingHandler.java
index 33d81d02058c..ad36ffcc9c83 100644
--- a/bundles/org.openhab.binding.modbus/src/main/java/org/openhab/binding/modbus/handler/ModbusPollerThingHandler.java
+++ b/bundles/org.openhab.binding.modbus/src/main/java/org/openhab/binding/modbus/handler/ModbusPollerThingHandler.java
@@ -197,7 +197,7 @@ private class PollResult {
 
         @Override
         public String toString() {
-            return result == null ? String.format("PollResult(result=%s)", result)
+            return failure == null ? String.format("PollResult(result=%s)", result)
                     : String.format("PollResult(failure=%s)", failure);
         }
     }