diff --git a/src/drivers/intel/gma/acpi/common.asl b/src/drivers/intel/gma/acpi/common.asl
index 0cf28fafbf..739b91c859 100644
--- a/src/drivers/intel/gma/acpi/common.asl
+++ b/src/drivers/intel/gma/acpi/common.asl
@@ -40,7 +40,7 @@
 			Store (BRID (XBQC ()), Local0)
 			If (LNotEqual (Local0, 2))
 			{
-				Decrement (Local0)
+				Local0--
 			}
 			XBCM (DerefOf (BRIG[Local0]))
 		}
diff --git a/src/drivers/intel/gma/acpi/configure_brightness_levels.asl b/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
index 99d2bc5ff9..11d8fcd88a 100644
--- a/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
+++ b/src/drivers/intel/gma/acpi/configure_brightness_levels.asl
@@ -83,7 +83,7 @@
 						Return (Ones)
 					}
 				}
-				Decrement (Local0)
+				Local0--
 			}
 
 			Return (Ones)