tracker/server.go | 12 ++++++------
 tracker/udp.go    | 14 +++++++-------

diff --git a/tracker/server.go b/tracker/server.go
index e8613b08eb14ca3dad007bc755fddd99931ab9f0..3e98ae1d61c6054bf960f7b690a443efe9f6cdbe 100644
--- a/tracker/server.go
+++ b/tracker/server.go
@@ -65,23 +65,23 @@ 	if err != nil {
 		return
 	}
 	switch h.Action {
-	case Connect:
+	case ActionConnect:
 		if h.ConnectionId != connectRequestConnectionId {
 			return
 		}
 		connId := me.newConn()
 		err = me.respond(addr, ResponseHeader{
-			Connect,
+			ActionConnect,
 			h.TransactionId,
 		}, ConnectionResponse{
 			connId,
 		})
 		return
-	case Announce:
+	case ActionAnnounce:
 		if _, ok := me.conns[h.ConnectionId]; !ok {
 			me.respond(addr, ResponseHeader{
 				TransactionId: h.TransactionId,
-				Action:        Error,
+				Action:        ActionError,
 			}, []byte("not connected"))
 			return
 		}
@@ -97,7 +97,7 @@ 			panic(err)
 		}
 		err = me.respond(addr, ResponseHeader{
 			TransactionId: h.TransactionId,
-			Action:        Announce,
+			Action:        ActionAnnounce,
 		}, AnnounceResponseHeader{
 			Interval: 900,
 			Leechers: t.Leechers,
@@ -108,7 +108,7 @@ 	default:
 		err = fmt.Errorf("unhandled action: %d", h.Action)
 		me.respond(addr, ResponseHeader{
 			TransactionId: h.TransactionId,
-			Action:        Error,
+			Action:        ActionError,
 		}, []byte("unhandled action"))
 		return
 	}
diff --git a/tracker/udp.go b/tracker/udp.go
index d853674753f771095d657c99256c9efcb1be7abf..36f7cc7eeda47f7161378a1d3f12625bca791476 100644
--- a/tracker/udp.go
+++ b/tracker/udp.go
@@ -20,10 +20,10 @@
 type Action int32
 
 const (
-	Connect Action = iota
-	Announce
-	Scrape
-	Error
+	ActionConnect Action = iota
+	ActionAnnounce
+	ActionScrape
+	ActionError
 
 	connectRequestConnectionId = 0x41727101980
 
@@ -110,7 +110,7 @@ 	reqURI := c.url.RequestURI()
 	// Clearly this limits the request URI to 255 bytes. BEP 41 supports
 	// longer but I'm not fussed.
 	options := append([]byte{optionTypeURLData, byte(len(reqURI))}, []byte(reqURI)...)
-	b, err := c.request(Announce, req, options)
+	b, err := c.request(ActionAnnounce, req, options)
 	if err != nil {
 		return
 	}
@@ -215,7 +215,7 @@ 		if h.TransactionId != tid {
 			continue
 		}
 		c.contiguousTimeouts = 0
-		if h.Action == Error {
+		if h.Action == ActionError {
 			err = errors.New(buf.String())
 		}
 		responseBody = buf
@@ -254,7 +254,7 @@ 			return
 		}
 		c.socket = pproffd.WrapNetConn(c.socket)
 	}
-	b, err := c.request(Connect, nil, nil)
+	b, err := c.request(ActionConnect, nil, nil)
 	if err != nil {
 		return
 	}