diff --git a/plugin/cache/cache.go b/plugin/cache/cache.go
index 5c5e3dbfe..c88f831a4 100644
--- a/plugin/cache/cache.go
+++ b/plugin/cache/cache.go
@@ -302,9 +302,9 @@ func (w *verifyStaleResponseWriter) WriteMsg(res *dns.Msg) error {
 }
 
 const (
-	maxTTL  = dnsutil.MaximumDefaulTTL
+	maxTTL  = dnsutil.MaximumDefaultTTL
 	minTTL  = dnsutil.MinimalDefaultTTL
-	maxNTTL = dnsutil.MaximumDefaulTTL / 2
+	maxNTTL = dnsutil.MaximumDefaultTTL / 2
 	minNTTL = dnsutil.MinimalDefaultTTL
 
 	defaultCap = 10000 // default capacity of the cache.
diff --git a/plugin/pkg/dnsutil/ttl.go b/plugin/pkg/dnsutil/ttl.go
index c7f423a76..7ac2f987a 100644
--- a/plugin/pkg/dnsutil/ttl.go
+++ b/plugin/pkg/dnsutil/ttl.go
@@ -47,7 +47,8 @@ func MinimalTTL(m *dns.Msg, mt response.Type) time.Duration {
 const (
 	// MinimalDefaultTTL is the absolute lowest TTL we use in CoreDNS.
 	MinimalDefaultTTL = 5 * time.Second
-	// MaximumDefaulTTL is the maximum TTL was use on RRsets in CoreDNS.
-	// TODO: rename as MaximumDefaultTTL
-	MaximumDefaulTTL = 1 * time.Hour
+	// MaximumDefaultTTL is the maximum TTL was use on RRsets in CoreDNS.
+	MaximumDefaultTTL = 1 * time.Hour
+	// Deprecated: use MaximumDefaultTTL instead.
+	MaximumDefaulTTL = MaximumDefaultTTL
 )