diff --git a/protocols/bgp/server/BUILD.bazel b/protocols/bgp/server/BUILD.bazel
index ca1e89d75ce976c50c1f21f37c8b45dac542a383..92eb3a7838522e9bf7a2a6508e70a977875e75c1 100644
--- a/protocols/bgp/server/BUILD.bazel
+++ b/protocols/bgp/server/BUILD.bazel
@@ -14,7 +14,6 @@ go_library(
         "fsm_manager.go",
         "fsm_open_confirm.go",
         "fsm_open_sent.go",
-        "helper.go",
         "peer.go",
         "server.go",
         "sockopt.go",
diff --git a/protocols/bgp/server/helper.go b/protocols/bgp/server/helper.go
deleted file mode 100644
index 7a7255f026b7ef5b7834a51ccd351820f8f7b1e6..0000000000000000000000000000000000000000
--- a/protocols/bgp/server/helper.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package server
-
-import (
-	bnet "github.com/bio-routing/bio-rd/net"
-	"github.com/bio-routing/bio-rd/protocols/bgp/packet"
-)
-
-func afiForPrefix(pfx bnet.Prefix) uint16 {
-	if pfx.Addr().IsIPv4() {
-		return packet.IPv6AFI
-	}
-
-	return packet.IPv6AFI
-}