diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c
index 526510b3791e..3f3b5e3ca9eb 100644
--- a/kernel/kcsan/core.c
+++ b/kernel/kcsan/core.c
@@ -1050,7 +1050,9 @@ EXPORT_SYMBOL(__tsan_init);
 DEFINE_TSAN_ATOMIC_OPS(8);
 DEFINE_TSAN_ATOMIC_OPS(16);
 DEFINE_TSAN_ATOMIC_OPS(32);
+#ifdef CONFIG_64BIT
 DEFINE_TSAN_ATOMIC_OPS(64);
+#endif
 
 void __tsan_atomic_thread_fence(int memorder);
 void __tsan_atomic_thread_fence(int memorder)