diff --git a/httpu/httpu.go b/httpu/httpu.go
index f52dad6..919589c 100644
--- a/httpu/httpu.go
+++ b/httpu/httpu.go
@@ -122,7 +122,7 @@ func (httpu *HTTPUClient) Do(req *http.Request, timeout time.Duration, numSends
 		// Parse response.
 		response, err := http.ReadResponse(bufio.NewReader(bytes.NewBuffer(responseBytes[:n])), req)
 		if err != nil {
-			log.Print("httpu: error while parsing response: %v", err)
+			log.Printf("httpu: error while parsing response: %v", err)
 			continue
 		}