diff --git a/ca/renew.go b/ca/renew.go
index b7d0fe2b..aee9dd13 100644
--- a/ca/renew.go
+++ b/ca/renew.go
@@ -14,7 +14,7 @@ import (
 // certificate.
 type RenewFunc func() (*tls.Certificate, error)
 
-// TLSRenewer automatically renews a tls certificate using a give RenewFunc.
+// TLSRenewer automatically renews a tls certificate using a RenewFunc.
 type TLSRenewer struct {
 	sync.RWMutex
 	RenewCertificate RenewFunc