diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 874e473cac4392ed61c09e6e37bce3b035871fed..c71fd16136ebd6c1bba199030fa420eb2fae5b3f 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -1481,6 +1481,14 @@ Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target)
                                  target);
 }
 
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefObjectType */
+Aml *aml_object_type(Aml *object)
+{
+    Aml *var = aml_opcode(0x8E /* ObjectTypeOp */);
+    aml_append(var, object);
+    return var;
+}
+
 void
 build_header(BIOSLinker *linker, GArray *table_data,
              AcpiTableHeader *h, const char *sig, int len, uint8_t rev,
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 10c09ca29f5c2060d704464382ad104b8507b623..7a548e15f52313277194b0b61e3ede74f11d9d87 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -363,6 +363,7 @@ Aml *aml_refof(Aml *arg);
 Aml *aml_derefof(Aml *arg);
 Aml *aml_sizeof(Aml *arg);
 Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target);
+Aml *aml_object_type(Aml *object);
 
 void
 build_header(BIOSLinker *linker, GArray *table_data,