diff --git a/protocol/id.go b/protocol/id.go
index 6a3e41de..96cc76f0 100644
--- a/protocol/id.go
+++ b/protocol/id.go
@@ -22,3 +22,12 @@ func (i ID) Validate() error {
 func (i ID) String() string {
 	return string(i)
 }
+
+// IDsToString converts a slice of IDs to strings.
+func IDsToString(ids []ID) []string {
+	out := make([]string, len(ids))
+	for i := range ids {
+		out[i] = ids[i].String()
+	}
+	return out
+}
diff --git a/stream/srpc/server/config.go b/stream/srpc/server/config.go
index 073017d1..5e96ab78 100644
--- a/stream/srpc/server/config.go
+++ b/stream/srpc/server/config.go
@@ -50,7 +50,7 @@ func (c *Config) ApplyDefaults(protocolIds []protocol.ID) *Config {
 		srvConf = &Config{}
 	}
 	if len(srvConf.GetProtocolIds()) == 0 {
-		srvConf.ProtocolIds = append(srvConf.ProtocolIds, c.ProtocolIds...)
+		srvConf.ProtocolIds = append(srvConf.ProtocolIds, protocol.IDsToString(protocolIds)...)
 	}
 	return srvConf
 }