diff --git a/src/include/cpu/cpu.h b/src/include/cpu/cpu.h
index b64fd3ce2c..d33b6da62e 100644
--- a/src/include/cpu/cpu.h
+++ b/src/include/cpu/cpu.h
@@ -9,7 +9,7 @@ void cpu_initialize(void);
 void initialize_cpus(struct bus *cpu_bus);
 void secondary_cpu_init(void);
 
-#if CONFIG_WAIT_BEFORE_CPUS_INIT==0
+#if !defined(CONFIG_WAIT_BEFORE_CPUS_INIT) || CONFIG_WAIT_BEFORE_CPUS_INIT==0
 	#define cpus_ready_for_init() do {} while(0)
 #else
 	void cpus_ready_for_init(void);