diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9faee1c893e53c8dea6e14d472a73a8b7131bf96..924a5ba7aa27cb75622b2d166ca84e5f546520d5 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -62,7 +62,7 @@ static pm_message_t pm_transition;
 
 static int async_error;
 
-static char *pm_verb(int event)
+static const char *pm_verb(int event)
 {
 	switch (event) {
 	case PM_EVENT_SUSPEND: