diff --git a/tools/libinput-debug-events.man b/tools/libinput-debug-events.man
index b8f0727f..89ddc2cf 100644
--- a/tools/libinput-debug-events.man
+++ b/tools/libinput-debug-events.man
@@ -130,6 +130,10 @@ Set the rotation angle in degrees (0 to 360).
 .TP 8
 .B \-\-set\-pressure\-range=<min>:<max>
 Set the tablet tool pressure range to min:max. min and max must be in range [0.0, 1.0].
+.TP 8
+.B \-\-set\-calibration="1.0 0.0 0.0 0.0 1.0 0.0"
+Set the first 6 elements of a 3x3 matrix to use for calibration. The third row of the
+matrix is always "0.0 0.0 0.1".
 .SH NOTES
 .PP
 Events shown by this tool may not correspond to the events seen by a