diff --git a/crypt.go b/crypt.go
index e7acdaaf..9344a5c4 100644
--- a/crypt.go
+++ b/crypt.go
@@ -8,14 +8,14 @@ import (
 )
 
 var (
-	errInvalidToken       = errors.New("Invalid token")
-	errInvalidURLEncoding = errors.New("Invalid token encoding")
+	errInvalidToken         = errors.New("Invalid token")
+	errInvalidTokenEncoding = errors.New("Invalid token encoding")
 )
 
 func validatePath(token, path string) error {
 	messageMAC, err := base64.RawURLEncoding.DecodeString(token)
 	if err != nil {
-		return errInvalidURLEncoding
+		return errInvalidTokenEncoding
 	}
 
 	mac := hmac.New(sha256.New, conf.Key)
diff --git a/process.go b/process.go
index 0a234c05..6549594f 100644
--- a/process.go
+++ b/process.go
@@ -95,10 +95,6 @@ func shutdownVips() {
 	C.vips_shutdown()
 }
 
-func round(f float64) int {
-	return int(f + .5)
-}
-
 func extractMeta(img *C.VipsImage) (int, int, int, bool) {
 	width := int(img.Xsize)
 	height := int(img.Ysize)