diff --git a/cache.go b/cache.go
index 1aa8c5e..651b102 100644
--- a/cache.go
+++ b/cache.go
@@ -22,7 +22,7 @@ type cacheEntry struct {
 // multiple Conns. Returned references should not be mutated by callers. Certificates
 // are still safe to use after they are removed from the cache.
 //
-// Certificates are returned wrapped in a activeCert struct that should be held by
+// Certificates are returned wrapped in an activeCert struct that should be held by
 // the caller. When references to the activeCert are freed, the number of references
 // to the certificate in the cache is decremented. Once the number of references
 // reaches zero, the entry is evicted from the cache.
@@ -49,7 +49,7 @@ type activeCert struct {
 }
 
 // active increments the number of references to the entry, wraps the
-// certificate in the entry in a activeCert, and sets the finalizer.
+// certificate in the entry in an activeCert, and sets the finalizer.
 //
 // Note that there is a race between active and the finalizer set on the
 // returned activeCert, triggered if active is called after the ref count is