https://bugs.gentoo.org/978368
--- a/Osd.xs
+++ b/Osd.xs
@@ -42,7 +42,7 @@ constant(char *name, int len, int arg)
 
 MODULE = X::Osd		PACKAGE = X::Osd		PREFIX = xosd_
 
-PROTOTYPES: DISABLES
+PROTOTYPES: DISABLE
 		
 double
 constant(sv,arg)