diff --git a/crypto/crypto.go b/crypto/crypto.go
index df9707a..290b9fd 100644
--- a/crypto/crypto.go
+++ b/crypto/crypto.go
@@ -8,6 +8,7 @@ import (
 	"github.com/vacp2p/mvds/state"
 )
 
+// PublicKeyToPeerID turns an ECDSA Public Key to an mvds PeerID.
 func PublicKeyToPeerID(k ecdsa.PublicKey) state.PeerID {
 	var p state.PeerID
 	copy(p[:], crypto.FromECDSAPub(&k))