diff --git a/src/modules/Elsa.ActivityDefinitions/Implementations/ActivityDefinitionActivityProvider.cs b/src/modules/Elsa.ActivityDefinitions/Implementations/ActivityDefinitionActivityProvider.cs
index 1ed25af27..efcb782d9 100644
--- a/src/modules/Elsa.ActivityDefinitions/Implementations/ActivityDefinitionActivityProvider.cs
+++ b/src/modules/Elsa.ActivityDefinitions/Implementations/ActivityDefinitionActivityProvider.cs
@@ -39,7 +39,7 @@ public class ActivityDefinitionActivityProvider : IActivityProvider
 
         return new()
         {
-            ActivityType = definition.DefinitionId,
+            ActivityType = typeName,
             DisplayName = definition.DisplayName.WithDefault(typeName),
             Description = definition.Description,
             Category = definition.Category.WithDefault("Custom"),