diff --git a/provider/mem/mem.go b/provider/mem/mem.go
index 3948697d84..b574d0cbd0 100644
--- a/provider/mem/mem.go
+++ b/provider/mem/mem.go
@@ -262,9 +262,6 @@ func (a *Alerts) Put(alerts ...*types.Alert) error {
 
 // count returns the number of non-resolved alerts we currently have stored filtered by the provided state.
 func (a *Alerts) count(state types.AlertState) int {
-	a.mtx.Lock()
-	defer a.mtx.Unlock()
-
 	var count int
 	for _, alert := range a.alerts.List() {
 		if alert.Resolved() {