diff --git a/include/jemalloc/internal/rb.h b/include/jemalloc/internal/rb.h
index 7b675f09..423802eb 100644
--- a/include/jemalloc/internal/rb.h
+++ b/include/jemalloc/internal/rb.h
@@ -22,10 +22,6 @@
 #ifndef RB_H_
 #define	RB_H_
 
-#if 0
-__FBSDID("$FreeBSD: head/lib/libc/stdlib/rb.h 204493 2010-02-28 22:57:13Z jasone $");
-#endif
-
 #ifdef RB_COMPACT
 /* Node structure. */
 #define	rb_node(a_type)							\