diff --git a/sys/amd64/include/md_var.h b/sys/amd64/include/md_var.h
index 2f32cfdfb2f1..2bebb0e467c1 100644
--- a/sys/amd64/include/md_var.h
+++ b/sys/amd64/include/md_var.h
@@ -47,7 +47,6 @@ extern	u_int	cpu_high;
 extern	u_int	cpu_id;
 extern	u_int	cpu_procinfo;
 extern	char	cpu_vendor[];
-extern	uint16_t *elan_mmcr;
 extern	char	kstack[];
 extern	char	sigcode[];
 extern	int	szsigcode;