diff --git a/usr.sbin/sysinstall/label.c b/usr.sbin/sysinstall/label.c
index 08690f6ab144..ff1ec489377b 100644
--- a/usr.sbin/sysinstall/label.c
+++ b/usr.sbin/sysinstall/label.c
@@ -1389,7 +1389,7 @@ try_auto_label(Device **devs, Device *dev, int perc, int *req)
 #ifdef __ia64__
     AutoEfi = NULL;
     if (EfiChunk == NULL) {
-	sz = 100 * ONE_MEG;
+	sz = 400 * ONE_MEG;
 	AutoEfi = Create_Chunk_DWIM(label_chunk_info[here].c->disk,
 	    label_chunk_info[here].c, sz, efi, 0, 0);
 	if (AutoEfi == NULL) {