diff --git a/include/lib/bakery_lock.h b/include/lib/bakery_lock.h
index 037fa7d..95634cf 100644
--- a/include/lib/bakery_lock.h
+++ b/include/lib/bakery_lock.h
@@ -44,8 +44,8 @@
 #define NO_OWNER (-1)
 
 void bakery_lock_init(bakery_lock_t *bakery);
-void bakery_lock_get(unsigned long mpidr, bakery_lock_t *bakery);
-void bakery_lock_release(unsigned long mpidr, bakery_lock_t *bakery);
-int bakery_lock_try(unsigned long mpidr, bakery_lock_t *bakery);
+void bakery_lock_get(bakery_lock_t *bakery);
+void bakery_lock_release(bakery_lock_t *bakery);
+int bakery_lock_try(bakery_lock_t *bakery);
 
 #endif /* __BAKERY_LOCK_H__ */