diff --git a/pkg/apis/batch/types.go b/pkg/apis/batch/types.go
index 7a2ad011..f47ea670 100644
--- a/pkg/apis/batch/types.go
+++ b/pkg/apis/batch/types.go
@@ -233,6 +233,7 @@ type CronJobSpec struct {
 	StartingDeadlineSeconds *int64
 
 	// ConcurrencyPolicy specifies how to treat concurrent executions of a Job.
+	// Defaults to Allow.
 	// +optional
 	ConcurrencyPolicy ConcurrencyPolicy
 
diff --git a/pkg/apis/batch/v2alpha1/generated.proto b/pkg/apis/batch/v2alpha1/generated.proto
index 4f51d616..605dafe3 100644
--- a/pkg/apis/batch/v2alpha1/generated.proto
+++ b/pkg/apis/batch/v2alpha1/generated.proto
@@ -72,6 +72,7 @@ message CronJobSpec {
   optional int64 startingDeadlineSeconds = 2;
 
   // ConcurrencyPolicy specifies how to treat concurrent executions of a Job.
+  // Defaults to Allow.
   // +optional
   optional string concurrencyPolicy = 3;
 
diff --git a/pkg/apis/batch/v2alpha1/types.go b/pkg/apis/batch/v2alpha1/types.go
index 67f1c95e..1dfd4eee 100644
--- a/pkg/apis/batch/v2alpha1/types.go
+++ b/pkg/apis/batch/v2alpha1/types.go
@@ -94,6 +94,7 @@ type CronJobSpec struct {
 	StartingDeadlineSeconds *int64 `json:"startingDeadlineSeconds,omitempty" protobuf:"varint,2,opt,name=startingDeadlineSeconds"`
 
 	// ConcurrencyPolicy specifies how to treat concurrent executions of a Job.
+	// Defaults to Allow.
 	// +optional
 	ConcurrencyPolicy ConcurrencyPolicy `json:"concurrencyPolicy,omitempty" protobuf:"bytes,3,opt,name=concurrencyPolicy,casttype=ConcurrencyPolicy"`
 
diff --git a/pkg/apis/batch/v2alpha1/types_swagger_doc_generated.go b/pkg/apis/batch/v2alpha1/types_swagger_doc_generated.go
index c0b53b8e..dc4ff64c 100644
--- a/pkg/apis/batch/v2alpha1/types_swagger_doc_generated.go
+++ b/pkg/apis/batch/v2alpha1/types_swagger_doc_generated.go
@@ -52,7 +52,7 @@ var map_CronJobSpec = map[string]string{
 	"":                           "CronJobSpec describes how the job execution will look like and when it will actually run.",
 	"schedule":                   "Schedule contains the schedule in Cron format, see https://en.wikipedia.org/wiki/Cron.",
 	"startingDeadlineSeconds":    "Optional deadline in seconds for starting the job if it misses scheduled time for any reason.  Missed jobs executions will be counted as failed ones.",
-	"concurrencyPolicy":          "ConcurrencyPolicy specifies how to treat concurrent executions of a Job.",
+	"concurrencyPolicy":          "ConcurrencyPolicy specifies how to treat concurrent executions of a Job. Defaults to Allow.",
 	"suspend":                    "Suspend flag tells the controller to suspend subsequent executions, it does not apply to already started executions.  Defaults to false.",
 	"jobTemplate":                "JobTemplate is the object that describes the job that will be created when executing a CronJob.",
 	"successfulJobsHistoryLimit": "The number of successful finished jobs to retain. This is a pointer to distinguish between explicit zero and not specified.",