diff --git a/plat/intel/soc/n5x/include/n5x_clock_manager.h b/plat/intel/soc/n5x/include/n5x_clock_manager.h
index 14a5717..54477da 100644
--- a/plat/intel/soc/n5x/include/n5x_clock_manager.h
+++ b/plat/intel/soc/n5x/include/n5x_clock_manager.h
@@ -4,10 +4,9 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#ifndef CLOCKMANAGER_H
-#define CLOCKMANAGER_H
+#ifndef N5X_SOCFPGA_CLOCKMANAGER_H
+#define N5X_SOCFPGA_CLOCKMANAGER_H
 
-#include "socfpga_handoff.h"
 
 /* MACRO DEFINITION */
 #define SOCFPGA_GLOBAL_TIMER				0xffd01000
@@ -56,5 +55,6 @@
 uint32_t get_clk_freq(uint32_t psrc_reg);
 uint32_t get_mpu_clk(void);
 uint32_t get_cpu_clk(void);
+uint32_t get_mpu_periph_clk(void);
 
-#endif
+#endif /* N5X_SOCFPGA_CLOCKMANAGER_H */