diff --git a/app/MindWork AI Studio/Provider/OpenAI/ResponsesDeltaStreamLine.cs b/app/MindWork AI Studio/Provider/OpenAI/ResponsesDeltaStreamLine.cs
index 5bad9c1b..98ea7eb2 100644
--- a/app/MindWork AI Studio/Provider/OpenAI/ResponsesDeltaStreamLine.cs	
+++ b/app/MindWork AI Studio/Provider/OpenAI/ResponsesDeltaStreamLine.cs	
@@ -12,7 +12,7 @@ public record ResponsesDeltaStreamLine(
     #region Implementation of IResponseStreamLine
 
     /// <inheritdoc />
-    public bool ContainsContent() => !string.IsNullOrWhiteSpace(this.Delta);
+    public bool ContainsContent() => this.Delta is not null;
 
     /// <inheritdoc />
     public ContentStreamChunk GetContent() => new(this.Delta, this.GetSources());
@@ -36,4 +36,4 @@ public record ResponsesDeltaStreamLine(
     public IList<ISource> GetSources() => [];
 
     #endregion
-}
\ No newline at end of file
+}