diff --git a/uisimulator/win32/stdbool.h b/uisimulator/win32/stdbool.h
index f081b4e4d0..769d7ac709 100644
--- a/uisimulator/win32/stdbool.h
+++ b/uisimulator/win32/stdbool.h
@@ -19,4 +19,5 @@
 
 typedef unsigned int bool;
 #define true        1
-#define false       0
\ No newline at end of file
+#define false       0
+#define __attribute__(s)
\ No newline at end of file