diff --git a/reactos/drivers/input/i8042prt/i8042prt.c b/reactos/drivers/input/i8042prt/i8042prt.c
index 3bb59cc7b77..c5c2ee268a3 100644
--- a/reactos/drivers/input/i8042prt/i8042prt.c
+++ b/reactos/drivers/input/i8042prt/i8042prt.c
@@ -527,7 +527,7 @@ DriverEntry(
 #ifndef NDEBUG
 	DbgSetDebugFilterState(
 		DPFLTR_I8042PRT_ID,
-		DPFLTR_ERROR_LEVEL | DPFLTR_WARNING_LEVEL | DPFLTR_TRACE_LEVEL | DPFLTR_INFO_LEVEL,
+		(1 << DPFLTR_ERROR_LEVEL) | (1 << DPFLTR_WARNING_LEVEL) | (1 << DPFLTR_TRACE_LEVEL) | (1 << DPFLTR_INFO_LEVEL),
 		TRUE);
 #endif