diff --git a/acpi_tables/src/aml.rs b/acpi_tables/src/aml.rs
index c6e40c4b8..63c2e274f 100644
--- a/acpi_tables/src/aml.rs
+++ b/acpi_tables/src/aml.rs
@@ -21,8 +21,8 @@ pub const ZERO: Zero = Zero {};
 pub struct Zero {}
 
 impl Aml for Zero {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![0u8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(0u8)
     }
 }
 
@@ -30,8 +30,8 @@ pub const ONE: One = One {};
 pub struct One {}
 
 impl Aml for One {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![1u8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(1u8)
     }
 }
 
@@ -39,8 +39,8 @@ pub const ONES: Ones = Ones {};
 pub struct Ones {}
 
 impl Aml for Ones {
-    fn to_aml_bytes(&self) -> Vec<u8> {
-        vec![0xffu8]
+    fn append_aml_bytes(&self, v: &mut Vec<u8>) {
+        v.push(0xffu8)
     }
 }