diff --git a/BuildingBlocks/src/BuildingBlocks.API/Mvc/ControllerAttributes/HandleHttpCachingAttribute.cs b/BuildingBlocks/src/BuildingBlocks.API/Mvc/ControllerAttributes/HandleHttpCachingAttribute.cs
index dff50d84f2..90c786b7f6 100644
--- a/BuildingBlocks/src/BuildingBlocks.API/Mvc/ControllerAttributes/HandleHttpCachingAttribute.cs
+++ b/BuildingBlocks/src/BuildingBlocks.API/Mvc/ControllerAttributes/HandleHttpCachingAttribute.cs
@@ -45,7 +45,7 @@ public override async Task OnResultExecutionAsync(ResultExecutingContext context
             {
                 response.StatusCode = StatusCodes.Status304NotModified;
 
-                foreach (var header in response.Headers.Where(h => HEADERS_TO_KEEP_FOR304.Contains(h.Key)))
+                foreach (var header in response.Headers.Where(h => !HEADERS_TO_KEEP_FOR304.Contains(h.Key)))
                     response.Headers.Remove(header.Key);
 
                 return;