diff --git a/pkg/api/types.go b/pkg/api/types.go
index 272a370674..700d3f02f1 100644
--- a/pkg/api/types.go
+++ b/pkg/api/types.go
@@ -158,7 +158,7 @@ type Volume struct {
 	// The VolumeSource represents the location and type of a volume to mount.
 	// This is optional for now. If not specified, the Volume is implied to be an EmptyDir.
 	// This implied behavior is deprecated and will be removed in a future version.
-	VolumeSource `json:"inline,omitempty"`
+	VolumeSource `json:",inline,omitempty"`
 }
 
 // VolumeSource represents the source location of a volume to mount.
diff --git a/pkg/api/v1beta3/types.go b/pkg/api/v1beta3/types.go
index bd93a78356..4f07e2fb6d 100644
--- a/pkg/api/v1beta3/types.go
+++ b/pkg/api/v1beta3/types.go
@@ -177,7 +177,7 @@ type Volume struct {
 	// Source represents the location and type of a volume to mount.
 	// This is optional for now. If not specified, the Volume is implied to be an EmptyDir.
 	// This implied behavior is deprecated and will be removed in a future version.
-	VolumeSource `json:"inline,omitempty"`
+	VolumeSource `json:",inline,omitempty"`
 }
 
 // VolumeSource represents the source location of a valume to mount.