diff --git a/libcpu/arm/sep4020/interrupt.c b/libcpu/arm/sep4020/interrupt.c
index f688286d19..ebc9c9625b 100644
--- a/libcpu/arm/sep4020/interrupt.c
+++ b/libcpu/arm/sep4020/interrupt.c
@@ -107,7 +107,7 @@ void rt_hw_interrupt_umask(int vector)
  * @param old_handler the old interrupt service routine
  */
 rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
-                                        void *param, char *name)
+                                        void *param, const char *name)
 {
     rt_isr_handler_t old_handler = RT_NULL;