diff --git a/tools/ocaml/libs/xc/xenctrl.ml b/tools/ocaml/libs/xc/xenctrl.ml
index 2690f9a923..7e1aabad6c 100644
--- a/tools/ocaml/libs/xc/xenctrl.ml
+++ b/tools/ocaml/libs/xc/xenctrl.ml
@@ -70,6 +70,7 @@ type domain_create_flag =
   | CDF_IOMMU
   | CDF_NESTED_VIRT
   | CDF_VPMU
+  | CDF_TRAP_UNMAPPED_ACCESSES
 
 type domain_create_iommu_opts =
   | IOMMU_NO_SHAREPT
diff --git a/tools/ocaml/libs/xc/xenctrl.mli b/tools/ocaml/libs/xc/xenctrl.mli
index febbe1f6ae..f44dba61ae 100644
--- a/tools/ocaml/libs/xc/xenctrl.mli
+++ b/tools/ocaml/libs/xc/xenctrl.mli
@@ -63,6 +63,7 @@ type domain_create_flag =
   | CDF_IOMMU
   | CDF_NESTED_VIRT
   | CDF_VPMU
+  | CDF_TRAP_UNMAPPED_ACCESSES
 
 type domain_create_iommu_opts =
   | IOMMU_NO_SHAREPT