diff --git a/compatibility_matrices/compatibility_matrix.8.xml b/compatibility_matrices/compatibility_matrix.8.xml
index 41d7ed1..09d3fda 100644
--- a/compatibility_matrices/compatibility_matrix.8.xml
+++ b/compatibility_matrices/compatibility_matrix.8.xml
@@ -62,6 +62,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.automotive.audiocontrol</name>
+        <version>2</version>
         <interface>
             <name>IAudioControl</name>
             <instance>default</instance>
diff --git a/compatibility_matrices/compatibility_matrix.9.xml b/compatibility_matrices/compatibility_matrix.9.xml
index f616bdb..77e5cb4 100644
--- a/compatibility_matrices/compatibility_matrix.9.xml
+++ b/compatibility_matrices/compatibility_matrix.9.xml
@@ -70,6 +70,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.automotive.audiocontrol</name>
+        <version>2</version>
         <interface>
             <name>IAudioControl</name>
             <instance>default</instance>