diff --git a/pkg/api/types.go b/pkg/api/types.go
index b008bc5c9c3..1e180f545d6 100644
--- a/pkg/api/types.go
+++ b/pkg/api/types.go
@@ -1423,6 +1423,9 @@ const (
 	PodReady PodConditionType = "Ready"
 	// PodInitialized means that all init containers in the pod have started successfully.
 	PodInitialized PodConditionType = "Initialized"
+	// PodReasonUnschedulable reason in PodScheduled PodCondition means that the scheduler
+	// can't schedule the pod right now, for example due to insufficient resources in the cluster.
+	PodReasonUnschedulable = "Unschedulable"
 )
 
 type PodCondition struct {
diff --git a/pkg/api/v1/types.go b/pkg/api/v1/types.go
index de68b44e6d3..49d20fff4a3 100644
--- a/pkg/api/v1/types.go
+++ b/pkg/api/v1/types.go
@@ -1630,6 +1630,9 @@ const (
 	// PodReady means the pod is able to service requests and should be added to the
 	// load balancing pools of all matching services.
 	PodReady PodConditionType = "Ready"
+	// PodReasonUnschedulable reason in PodScheduled PodCondition means that the scheduler
+	// can't schedule the pod right now, for example due to insufficient resources in the cluster.
+	PodReasonUnschedulable = "Unschedulable"
 )
 
 // PodCondition contains details for the current condition of this pod.
diff --git a/plugin/pkg/scheduler/scheduler.go b/plugin/pkg/scheduler/scheduler.go
index 8b85398fd25..d5b8cc0a912 100644
--- a/plugin/pkg/scheduler/scheduler.go
+++ b/plugin/pkg/scheduler/scheduler.go
@@ -100,7 +100,7 @@ func (s *Scheduler) scheduleOne() {
 		s.config.PodConditionUpdater.Update(pod, &api.PodCondition{
 			Type:   api.PodScheduled,
 			Status: api.ConditionFalse,
-			Reason: "Unschedulable",
+			Reason: api.PodReasonUnschedulable,
 		})
 		return
 	}