diff --git a/core/loadpoint_plan.go b/core/loadpoint_plan.go
index 2a9aa7c28..e500b2bfa 100644
--- a/core/loadpoint_plan.go
+++ b/core/loadpoint_plan.go
@@ -123,8 +123,9 @@ func (lp *Loadpoint) plannerActive() (active bool) {
 
 	if active {
 		// ignore short plans if not already active
-		if !lp.planActive && lp.clock.Until(activeSlot.End) < smallSlotDuration {
-			lp.log.DEBUG.Printf("plan too short- ignoring remaining %v", requiredDuration.Round(time.Second))
+		// TODO only ignore if the next adjacent slot is inactive, too
+		if slotRemaining := lp.clock.Until(activeSlot.End); !lp.planActive && slotRemaining < smallSlotDuration {
+			lp.log.DEBUG.Printf("plan slot too short- ignoring remaining %v", slotRemaining.Round(time.Second))
 			return false
 		}