diff --git a/bin/History.txt b/bin/History.txt
index 98516c53..7ca1335c 100644
--- a/bin/History.txt
+++ b/bin/History.txt
@@ -17,7 +17,7 @@ Tom Charlesworth
 - [Change #1190] Document command line: '-multimon'.
   - At start-up, use the Registry's saved "Window x/y position" to position the AppleWin window correctly for multiple monitors.
 - [Change #1033] New command line support for hard disk controller in slots 5 and 7.
-  - Use '-s5 hdc' or 's7 hdc' to start up with a hard disk controller (hdc) in slots 5 and 7 respectively.
+  - Use '-s5 hdc' or '-s7 hdc' to start up with a hard disk controller (hdc) in slots 5 and 7 respectively.
   - Use '-s5h1 <pathname>' and '-s5h2 <pathname>' to connect to hard disk image.
   - NB. There's no GUI configuration support for the hdc in slot 5.
   - NB. An hdc in slot 5 allows these 3.5" titles to work: "Perplexing Puzzles" and "Dark Heart of Uukrul".
diff --git a/help/CommandLine.html b/help/CommandLine.html
index c2b3b7cf..7f1491fc 100644
--- a/help/CommandLine.html
+++ b/help/CommandLine.html
@@ -31,7 +31,11 @@
 		Start with hard disk 1 plugged-in (and auto power-on the Apple II). NB. Hard disk controller card gets enabled.<br><br>
 		-h2 &lt;pathname&gt;<br>
 		Start with hard disk 2 plugged-in. NB. Hard disk controller card gets enabled.<br><br>
-		NB. For -d1,-d2,-s5d1,-s5d2,-h1,-h2, if pathname is "", then the disk is ejected or the harddisk is unplugged.<br><br>
+		-s5h1 &lt;pathname&gt;<br>
+		Start with hard disk 1 plugged-in slot 5 (must be used with '-s5 hdc').<br><br>
+		-s5h2 &lt;pathname&gt;<br>
+		Start with hard disk 2 plugged-in slot 5 (must be used with '-s5 hdc').<br><br>
+		NB. For -d1,-d2,-s5d1,-s5d2,-h1,-h2,-s5h1,-s5h2, if pathname is "", then the disk is ejected or the hard disk is unplugged.<br><br>
 		-model &lt;apple2|apple2p|apple2jp|apple2e|apple2ee&gt;<br>
 		Select the machine model: Apple II, Apple II+, Apple II J-Plus, Apple //e, Enhanced Apple //e.<br><br>
 		-clock-multiplier &lt;value&gt;<br>