diff --git a/sim_disk.c b/sim_disk.c
index dd08ca2c..abf50e78 100644
--- a/sim_disk.c
+++ b/sim_disk.c
@@ -1221,7 +1221,7 @@ fprintf (st, "                 1 File(s)          5,120 bytes\n");
 fprintf (st, "  sim> atta rq3 -c RA92-1.vhd RA92.vhd\n");
 fprintf (st, "  sim> atta rq3 -c RA92-1.vhd RA92.vhd\n");
 fprintf (st, "  RQ3: creating new virtual disk 'RA92-1.vhd'\n");
-fprintf (st, "  RQ3: Copied 1505MB.  99% complete.\n");
+fprintf (st, "  RQ3: Copied 1505MB.  99%% complete.\n");
 fprintf (st, "  RQ3: Copied 1505MB. Done.\n");
 fprintf (st, "  sim> sh rq3\n");
 fprintf (st, "  RQ3, 1505MB, attached to RA92-1.vhd, write enabled, RA92, autosize, VHD format\n");
@@ -1243,7 +1243,7 @@ fprintf (st, "  sim> sho rq2\n");
 fprintf (st, "  RQ2, 456MB, not attached, write enabled, RA81, noautosize, SIMH format\n");
 fprintf (st, "  sim> atta rq2 -c RA81-Copy.vhd VMS055.dsk\n");
 fprintf (st, "  RQ2: creating new virtual disk 'RA81-Copy.vhd'\n");
-fprintf (st, "  RQ2: Copied 456MB.  99% complete.\n");
+fprintf (st, "  RQ2: Copied 456MB.  99%% complete.\n");
 fprintf (st, "  RQ2: Copied 456MB. Done.\n");
 fprintf (st, "  sim> sho rq2\n");
 fprintf (st, "  RQ2, 456MB, attached to RA81-Copy.vhd, write enabled, RA81, noautosize, VHD format\n");