diff --git a/src/server/Elsa.Server.Api/Endpoints/Activities/List.cs b/src/server/Elsa.Server.Api/Endpoints/Activities/List.cs
index fe6fe7bbd..ea474ec81 100644
--- a/src/server/Elsa.Server.Api/Endpoints/Activities/List.cs
+++ b/src/server/Elsa.Server.Api/Endpoints/Activities/List.cs
@@ -48,7 +48,7 @@ namespace Elsa.Server.Api.Endpoints.Activities
             var activityDescriptor = await _activityTypeService.DescribeActivityType(activityType, cancellationToken);
 
             // Filter out any non-browsable properties.
-            activityDescriptor.InputProperties = activityDescriptor.InputProperties.Where(x => x.IsBrowsable == true).ToArray();
+            activityDescriptor.InputProperties = activityDescriptor.InputProperties.Where(x => x.IsBrowsable is true or null).ToArray();
             
             return activityDescriptor;
         }