diff --git a/metrics.go b/metrics.go
index 3639f23..b52f7bf 100644
--- a/metrics.go
+++ b/metrics.go
@@ -2,7 +2,6 @@ package tusd
 
 import (
 	"errors"
-	"net"
 	"sync"
 	"sync/atomic"
 )
@@ -88,18 +87,8 @@ type simpleHTTPError struct {
 }
 
 func simplifyHTTPError(err HTTPError) simpleHTTPError {
-	var msg string
-	// Errors for read timeouts contain too much information which is not
-	// necessary for us and makes grouping for the metrics harder. The error
-	// message looks like: read tcp 127.0.0.1:1080->127.0.0.1:53673: i/o timeout
-	// Therefore, we use a common error message for all of them.
-	if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
-		msg = "read tcp: i/o timeout"
-	} else {
-		msg = err.Error()
-	}
 	return simpleHTTPError{
-		Message:    msg,
+		Message:    err.Error(),
 		StatusCode: err.StatusCode(),
 	}
 }
diff --git a/unrouted_handler.go b/unrouted_handler.go
index 6fd8d9c..0e10248 100644
--- a/unrouted_handler.go
+++ b/unrouted_handler.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"io"
 	"log"
+	"net"
 	"net/http"
 	"os"
 	"regexp"
@@ -611,6 +612,14 @@ func (handler *UnroutedHandler) sendError(w http.ResponseWriter, r *http.Request
 		err = ErrNotFound
 	}
 
+	// Errors for read timeouts contain too much information which is not
+	// necessary for us and makes grouping for the metrics harder. The error
+	// message looks like: read tcp 127.0.0.1:1080->127.0.0.1:53673: i/o timeout
+	// Therefore, we use a common error message for all of them.
+	if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
+		err = errors.New("read tcp: i/o timeout")
+	}
+
 	statusErr, ok := err.(HTTPError)
 	if !ok {
 		statusErr = NewHTTPError(err, http.StatusInternalServerError)