diff --git a/lib/libkvm/kvm_proc.c b/lib/libkvm/kvm_proc.c
index a2319428eca6..bacc3a4a8b31 100644
--- a/lib/libkvm/kvm_proc.c
+++ b/lib/libkvm/kvm_proc.c
@@ -254,7 +254,7 @@ kvm_proclist(kd, what, arg, p, bp, maxcnt)
 			if (tty.t_pgrp != NULL) {
 				if (KREAD(kd, (u_long)tty.t_pgrp, &pgrp)) {
 					_kvm_err(kd, kd->program,
-						 "can't read tpgrp at &x",
+						 "can't read tpgrp at %x",
 						tty.t_pgrp);
 					return (-1);
 				}