diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 045a4e2ee3b4ce90b341b40f3048fb078935b959..f26466aeddc07d8eaa1a110c7bca13673dde3a6a 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -494,6 +494,14 @@ Aml *aml_add(Aml *arg1, Aml *arg2)
     return var;
 }
 
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefIncrement */
+Aml *aml_increment(Aml *arg)
+{
+    Aml *var = aml_opcode(0x75 /* IncrementOp */);
+    aml_append(var, arg);
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefIndex */
 Aml *aml_index(Aml *arg1, Aml *idx)
 {
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 9abb4c39d1431ed71cd3a2a47987139775196f31..1a891a20da5bfcc5d45663387eb5397c0ee713fc 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -206,6 +206,7 @@ Aml *aml_shiftleft(Aml *arg1, Aml *count);
 Aml *aml_shiftright(Aml *arg1, Aml *count);
 Aml *aml_lless(Aml *arg1, Aml *arg2);
 Aml *aml_add(Aml *arg1, Aml *arg2);
+Aml *aml_increment(Aml *arg);
 Aml *aml_index(Aml *arg1, Aml *idx);
 Aml *aml_notify(Aml *arg1, Aml *arg2);
 Aml *aml_call1(const char *method, Aml *arg1);