diff --git a/src/DurableTask.ServiceBus/Common/Abstraction/ServiceBusAbstraction.cs b/src/DurableTask.ServiceBus/Common/Abstraction/ServiceBusAbstraction.cs
index 779f95c9d..c8d97b205 100644
--- a/src/DurableTask.ServiceBus/Common/Abstraction/ServiceBusAbstraction.cs
+++ b/src/DurableTask.ServiceBus/Common/Abstraction/ServiceBusAbstraction.cs
@@ -140,7 +140,9 @@ public async Task SetStateAsync(byte[] sessionState)
         {
             if (sessionState == null)
             {
-                await this.sessionReceiver.SetSessionStateAsync(new BinaryData(new byte[] { }));
+                // Setting session state to null is equivalent to deleting session state.
+                // Setting session state to empty byte array is not equivalent to deleting session state.
+                await this.sessionReceiver.SetSessionStateAsync(null);
             }
             else
             {