diff --git a/wand/mogrify.c b/wand/mogrify.c
index 791b951..7a01251 100644
--- a/wand/mogrify.c
+++ b/wand/mogrify.c
@@ -3462,7 +3462,7 @@
"-cdl filename color correct with a color decision list",
"-charcoal radius simulate a charcoal drawing",
"-chop geometry remove pixels from the image interior",
- "-clamp restrict pixel range from 0 to pixel range",
+ "-clamp restrict pixel range from 0 to the quantum depth",
"-clip clip along the first path from the 8BIM profile",
"-clip-mask filename associate a clip mask with the image",
"-clip-path id clip along a named path from the 8BIM profile",