diff --git a/charger/mystrom.go b/charger/mystrom.go
index f25a038f3..570d996e4 100644
--- a/charger/mystrom.go
+++ b/charger/mystrom.go
@@ -69,7 +69,7 @@ func (c *MyStrom) Enable(enable bool) error {
 	c.reportG = provider.Cached(c.Report, c.cache)
 
 	onoff := map[bool]int{false: 0, true: 1}
-	return c.Request(fmt.Sprintf("relay/state=%d", onoff[enable]))
+	return c.Request(fmt.Sprintf("relay?state=%d", onoff[enable]))
 }
 
 // MaxCurrent implements the api.Charger interface
diff --git a/meter/mystrom/mystrom.go b/meter/mystrom/mystrom.go
index b4514dac5..32db988a4 100644
--- a/meter/mystrom/mystrom.go
+++ b/meter/mystrom/mystrom.go
@@ -2,6 +2,7 @@ package mystrom
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/evcc-io/evcc/api"
 	"github.com/evcc-io/evcc/util"
@@ -20,7 +21,7 @@ type Connection struct {
 
 func NewConnection(uri string) *Connection {
 	return &Connection{
-		uri:    uri,
+		uri:    util.DefaultScheme(strings.TrimSuffix(uri, "/"), "http"),
 		Helper: request.NewHelper(util.NewLogger("mystrom")),
 	}
 }