diff --git a/src/core/Elsa.Core/Extensions/ElsaServiceCollectionExtensions.cs b/src/core/Elsa.Core/Extensions/ElsaServiceCollectionExtensions.cs
index 74c90ea34..9e121b9d4 100644
--- a/src/core/Elsa.Core/Extensions/ElsaServiceCollectionExtensions.cs
+++ b/src/core/Elsa.Core/Extensions/ElsaServiceCollectionExtensions.cs
@@ -133,6 +133,7 @@ namespace Microsoft.Extensions.DependencyInjection
 
         private static IServiceCollection AddPrimitiveActivities(this IServiceCollection services) =>
             services
+                .AddActivity<Inline>()
                 .AddActivity<Finish>()
                 .AddActivity<For>()
                 .AddActivity<ForEach>()