diff --git a/src/include/fallback.h b/src/include/fallback.h
index b639452..ffcbafb 100644
--- a/src/include/fallback.h
+++ b/src/include/fallback.h
@@ -1,12 +1,12 @@
 #ifndef FALLBACK_H
 #define FALLBACK_H
 
-#if !defined(ASSEMBLY) && !defined(__PRE_RAM__)
+#if !defined(__ASSEMBLER__) && !defined(__PRE_RAM__)
 
 void set_boot_successful(void);
 void boot_successful(void);
 
-#endif /* ASSEMBLY */
+#endif /* __ASSEMBLER__ */
 
 #define RTC_BOOT_BYTE	48