diff --git a/arch/arm/cpu/pxa/cache.c b/arch/arm/cpu/pxa/cache.c
index d26354e..30e1e34 100644
--- a/arch/arm/cpu/pxa/cache.c
+++ b/arch/arm/cpu/pxa/cache.c
@@ -52,6 +52,6 @@
 
 __weak void l2_cache_disable(void) {}
 
-#if defined CONFIG_SYS_THUMB_BUILD
+#if CONFIG_IS_ENABLED(SYS_THUMB_BUILD)
 __weak void invalidate_l2_cache(void) {}
 #endif