diff --git a/usr.bin/xinstall/xinstall.c b/usr.bin/xinstall/xinstall.c
index 3e10bdbd0cd8..23dde6dbdfbd 100644
--- a/usr.bin/xinstall/xinstall.c
+++ b/usr.bin/xinstall/xinstall.c
@@ -33,7 +33,9 @@
 
 #include <sys/cdefs.h>
 
+#ifdef __FBSDID
 __FBSDID("$FreeBSD$");
+#endif
 
 #ifndef lint
 static const char copyright[] =