diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 99d213c1827f399874fe966cb193dd99ea2b2c4d..57e3176c62419ab572975b030bb29a858e0c6610 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -408,6 +408,15 @@ Aml *aml_arg(int pos)
     return var;
 }
 
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefStore */
+Aml *aml_store(Aml *val, Aml *target)
+{
+    Aml *var = aml_opcode(0x70 /* StoreOp */);
+    aml_append(var, val);
+    aml_append(var, target);
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefIfElse */
 Aml *aml_if(Aml *predicate)
 {
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 63e9754ad6bcad46454e3c386f56a4bfc9dfe9e3..6ad76ddc62b90a2c86a237601ae859c5f133253b 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -65,6 +65,7 @@ Aml *aml_name_decl(const char *name, Aml *val);
 Aml *aml_return(Aml *val);
 Aml *aml_int(const uint64_t val);
 Aml *aml_arg(int pos);
+Aml *aml_store(Aml *val, Aml *target);
 
 /* Block AML object primitives */
 Aml *aml_scope(const char *name_format, ...) GCC_FMT_ATTR(1, 2);