diff --git a/base/usr/include/stdio.h b/base/usr/include/stdio.h
index 83140d81..f8ff0c9a 100644
--- a/base/usr/include/stdio.h
+++ b/base/usr/include/stdio.h
@@ -7,6 +7,7 @@
 _Begin_C_Header
 
 typedef struct _FILE FILE;
+#define __DEFINED_FILE
 
 #define BUFSIZ 8192