diff --git a/tools/perplexity/perplexity.go b/tools/perplexity/perplexity.go
index 4310a9260..2ae4a73db 100644
--- a/tools/perplexity/perplexity.go
+++ b/tools/perplexity/perplexity.go
@@ -58,7 +58,7 @@ func (p *Perplexity) Call(ctx context.Context, input string) (string, error) {
 
 	var generatedText string
 	_, err := p.llm.GenerateContent(ctx, content,
-		llms.WithStreamingFunc(func(ctx context.Context, chunk []byte) error {
+		llms.WithStreamingFunc(func(_ context.Context, chunk []byte) error {
 			generatedText += string(chunk)
 			return nil
 		}))