diff --git a/dnsfilter/dnsfilter.go b/dnsfilter/dnsfilter.go
index bc03e448..a642abe4 100644
--- a/dnsfilter/dnsfilter.go
+++ b/dnsfilter/dnsfilter.go
@@ -133,6 +133,23 @@ const (
 	FilteredSafeSearch
 )
 
+func (i Reason) String() string {
+	names := []string{
+		"NotFilteredNotFound",
+		"NotFilteredWhiteList",
+		"NotFilteredError",
+		"FilteredBlackList",
+		"FilteredSafeBrowsing",
+		"FilteredParental",
+		"FilteredInvalid",
+		"FilteredSafeSearch",
+	}
+	if uint(i) >= uint(len(names)) {
+		return ""
+	}
+	return names[i]
+}
+
 type dnsFilterContext struct {
 	stats             Stats
 	dialCache         gcache.Cache // "host" -> "IP" cache for safebrowsing and parental control servers
diff --git a/dnsfilter/reason_string.go b/dnsfilter/reason_string.go
deleted file mode 100644
index cb097e52..00000000
--- a/dnsfilter/reason_string.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Code generated by "stringer -type=Reason"; DO NOT EDIT.
-
-package dnsfilter
-
-import "strconv"
-
-const _Reason_name = "NotFilteredNotFoundNotFilteredWhiteListNotFilteredErrorFilteredBlackListFilteredSafeBrowsingFilteredParentalFilteredInvalidFilteredSafeSearch"
-
-var _Reason_index = [...]uint8{0, 19, 39, 55, 72, 92, 108, 123, 141}
-
-func (i Reason) String() string {
-	if i < 0 || i >= Reason(len(_Reason_index)-1) {
-		return "Reason(" + strconv.FormatInt(int64(i), 10) + ")"
-	}
-	return _Reason_name[_Reason_index[i]:_Reason_index[i+1]]
-}