diff --git a/include/hardware/keymaster2.h b/include/hardware/keymaster2.h
index 565ad2e..f1993f8 100644
--- a/include/hardware/keymaster2.h
+++ b/include/hardware/keymaster2.h
@@ -420,7 +420,7 @@
 /* Convenience API for opening and closing keymaster devices */
 
 static inline int keymaster2_open(const struct hw_module_t* module, keymaster2_device_t** device) {
-    return module->methods->open(module, KEYSTORE_KEYMASTER, (struct hw_device_t**)device);
+    return module->methods->open(module, KEYSTORE_KEYMASTER, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int keymaster2_close(keymaster2_device_t* device) {