diff --git a/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/validation/validation.go b/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/validation/validation.go
index 4c5e62851e1..fbcede34f75 100644
--- a/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/validation/validation.go
+++ b/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/validation/validation.go
@@ -57,6 +57,7 @@ func convertJSONSchemaProps(in *apiextensions.JSONSchemaProps, out *spec.Schema)
 	}
 	out.Format = in.Format
 	out.Title = in.Title
+	out.Maximum = in.Maximum
 	out.ExclusiveMaximum = in.ExclusiveMaximum
 	out.Minimum = in.Minimum
 	out.ExclusiveMinimum = in.ExclusiveMinimum