diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 1bf093d..0ea96ba 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -304,7 +304,7 @@
 
 int audit_match_class(int class, unsigned syscall)
 {
-	if (unlikely(syscall >= AUDIT_BITMASK_SIZE * sizeof(__u32)))
+	if (unlikely(syscall >= AUDIT_BITMASK_SIZE * 32))
 		return 0;
 	if (unlikely(class >= AUDIT_SYSCALL_CLASSES || !classes[class]))
 		return 0;