diff --git a/include/system/window.h b/include/system/window.h
index 16b7b6797..31f202f46 100644
--- a/include/system/window.h
+++ b/include/system/window.h
@@ -26,8 +26,8 @@
 #include <system/graphics.h>
 #include <unistd.h>
 
-#ifndef __unused
-#define __unused __attribute__((__unused__))
+#ifndef __UNUSED
+#define __UNUSED __attribute__((__unused__))
 #endif
 #ifndef __deprecated
 #define __deprecated __attribute__((__deprecated__))
@@ -610,19 +610,19 @@ static inline int native_window_set_usage(
 
 /* deprecated. Always returns 0. Don't call. */
 static inline int native_window_connect(
-        struct ANativeWindow* window __unused, int api __unused) __deprecated;
+        struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
 
 static inline int native_window_connect(
-        struct ANativeWindow* window __unused, int api __unused) {
+        struct ANativeWindow* window __UNUSED, int api __UNUSED) {
     return 0;
 }
 
 /* deprecated. Always returns 0. Don't call. */
 static inline int native_window_disconnect(
-        struct ANativeWindow* window __unused, int api __unused) __deprecated;
+        struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
 
 static inline int native_window_disconnect(
-        struct ANativeWindow* window __unused, int api __unused) {
+        struct ANativeWindow* window __UNUSED, int api __UNUSED) {
     return 0;
 }