diff --git a/src/arm/macros.h b/src/arm/macros.h
index a949b9f4f..ecef3abf9 100644
--- a/src/arm/macros.h
+++ b/src/arm/macros.h
@@ -61,4 +61,7 @@
 	}
 
 #define DECL_BIT(TYPE, FIELD, BIT) DECL_BITS(TYPE, FIELD, BIT, 1)
+
+#define LIKELY(X) __builtin_expect(!!(X), 1)
+#define UNLIKELY(X) __builtin_expect(!!(X), 0)
 #endif