diff --git a/src/soc/intel/cannonlake/acpi/southbridge.asl b/src/soc/intel/cannonlake/acpi/southbridge.asl
index 4a62485324..e4f29b6a37 100644
--- a/src/soc/intel/cannonlake/acpi/southbridge.asl
+++ b/src/soc/intel/cannonlake/acpi/southbridge.asl
@@ -37,7 +37,7 @@
 /* Serial IO */
 #include "serialio.asl"
 
-/* SMBus 0:1f.3 */
+/* SMBus 0:1f.4 */
 #include "smbus.asl"
 
 /* USB XHCI 0:14.0 */