diff --git a/include/cpu.h b/include/cpu.h
index 5831bfa..be02a16 100644
--- a/include/cpu.h
+++ b/include/cpu.h
@@ -7,6 +7,8 @@
 #ifndef __CPU_H
 #define __CPU_H
 
+struct udevice;
+
 /**
  * struct cpu_plat - platform data for a CPU
  * @cpu_id:	   Platform-specific way of identifying the CPU.