diff --git a/MANUAL.md b/MANUAL.md
index 7a67cd7c6..a61ccb88c 100644
--- a/MANUAL.md
+++ b/MANUAL.md
@@ -758,7 +758,8 @@ summary postings within each interval:
 The `--width`/`-w` option adjusts the width of the output. By default,
 this is 80 characters. To allow more space for descriptions and account
 names, use `-w` to increase the width to 120 characters, or `-wN` to set
-any desired width (at least 50 recommended).
+any desired width (at least 50 recommended, with no space before the N -
+eg `-w200` or `--width=200`,
 
 The `--related`/`-r` flag shows the *other* postings in the transactions
 of the postings which would normally be shown.