diff --git a/conn.go b/conn.go
index d68d997e..a4f53940 100644
--- a/conn.go
+++ b/conn.go
@@ -569,7 +569,7 @@ type transport interface {
 }
 
 var (
-	transports map[string]func(string) (transport, error) = make(map[string]func(string) (transport, error))
+	transports = make(map[string]func(string) (transport, error))
 )
 
 func getTransport(address string) (transport, error) {
@@ -586,6 +586,7 @@ func getTransport(address string) (transport, error) {
 		f := transports[v[:i]]
 		if f == nil {
 			err = errors.New("dbus: invalid bus address (invalid or unsupported transport)")
+			continue
 		}
 		t, err = f(v[i+1:])
 		if err == nil {