diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 2284723..6e1bc8f 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -365,7 +365,10 @@
     </hal>
     <hal format="hidl" optional="true">
         <name>android.hardware.radio.config</name>
-        <version>1.2</version>
+        <!--
+        See compatibility_matrix.4.xml on versioning of radio config HAL.
+        -->
+        <version>1.1</version>
         <interface>
             <name>IRadioConfig</name>
             <instance>default</instance>