diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index b3a43b1..b82f6ee 100644
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -530,7 +530,7 @@
 int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size);
 int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size);
 
-void prcmu_ac_wake_req(void);
+int prcmu_ac_wake_req(void);
 void prcmu_ac_sleep_req(void);
 void db8500_prcmu_modem_reset(void);
 
@@ -680,7 +680,10 @@
 	return -ENOSYS;
 }
 
-static inline void prcmu_ac_wake_req(void) {}
+static inline int prcmu_ac_wake_req(void)
+{
+	return 0;
+}
 
 static inline void prcmu_ac_sleep_req(void) {}
 
diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h
index 5a13f93..5b90e94 100644
--- a/include/linux/mfd/dbx500-prcmu.h
+++ b/include/linux/mfd/dbx500-prcmu.h
@@ -345,7 +345,7 @@
 	return db8500_prcmu_get_reset_code();
 }
 
-void prcmu_ac_wake_req(void);
+int prcmu_ac_wake_req(void);
 void prcmu_ac_sleep_req(void);
 static inline void prcmu_modem_reset(void)
 {
@@ -533,7 +533,10 @@
 	return 0;
 }
 
-static inline void prcmu_ac_wake_req(void) {}
+static inline int prcmu_ac_wake_req(void)
+{
+	return 0;
+}
 
 static inline void prcmu_ac_sleep_req(void) {}