diff --git a/sys/dev/cxgbe/t4_l2t.c b/sys/dev/cxgbe/t4_l2t.c
index 2c1999afc787..cca1bf314b56 100644
--- a/sys/dev/cxgbe/t4_l2t.c
+++ b/sys/dev/cxgbe/t4_l2t.c
@@ -321,7 +321,6 @@ skip:
 		mtx_unlock(&e->lock);
 	}
 
-	sbuf_putc(sb, 0); /* nullterm */
 	rc = sbuf_finish(sb);
 	sbuf_delete(sb);
 
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index 58216e25686d..24471920d9c1 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -5087,7 +5087,6 @@ sysctl_int_array(SYSCTL_HANDLER_ARGS)
 	for (i = arg1; arg2; arg2 -= sizeof(int), i++)
 		sbuf_printf(&sb, "%d ", *i);
 	sbuf_trim(&sb);
-	sbuf_putc(&sb, 0); /* nullterm */
 	sbuf_finish(&sb);
 	rc = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
 	sbuf_delete(&sb);