diff --git a/src/Zengenti.Contensis.RequestHandler.Application/Services/CorePublishingService.cs b/src/Zengenti.Contensis.RequestHandler.Application/Services/CorePublishingService.cs
index e994b5d..c1f938a 100644
--- a/src/Zengenti.Contensis.RequestHandler.Application/Services/CorePublishingService.cs
+++ b/src/Zengenti.Contensis.RequestHandler.Application/Services/CorePublishingService.cs
@@ -86,7 +86,7 @@ public CorePublishingService(
             $"when calling IPublishingApi.GetEndpointForRequest for requestContext {requestContext.ToJson()}";
         if (originUri != null)
         {
-            messageSuffix = messageSuffix += " and path {originUri.AbsolutePath}.";
+            messageSuffix = messageSuffix += $" and path {originUri.AbsolutePath}.";
         }
 
         ExceptionDispatchInfo? exceptionDispatchInfo = null;