diff --git a/manual/tracy.tex b/manual/tracy.tex
index 5f7c0eb4..7d85835f 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -1288,7 +1288,7 @@ The \emph{found zones} section displays the individual zones grouped according t
 \item \emph{Call stacks} -- Zones are grouped by the originating call stack (see section~\ref{collectingcallstacks}).
 \end{itemize}
 
-Each group may be sorted according to the \emph{order} in which it appeared, the call \emph{count}, or the total \emph{time} spent in the group. Expanding the group view will display individual occurrences of the zone, sorted by application's time. Clicking the \LMB{} left mouse button on a zone will open the zone information window (section~\ref{zoneinfo}). Clicking the \MMB{} middle mouse button on a zone will zoom the timeline view to the zone's extent.
+Each group may be sorted according to the \emph{order} in which it appeared, the call \emph{count}, the total \emph{time} spent in the group, or the \emph{mean time per call}. Expanding the group view will display individual occurrences of the zone, sorted by application's time. Clicking the \LMB{} left mouse button on a zone will open the zone information window (section~\ref{zoneinfo}). Clicking the \MMB{} middle mouse button on a zone will zoom the timeline view to the zone's extent.
 
 Clicking the \LMB{} left mouse button on group name will highlight the group time data on the histogram (figure~\ref{findzonehistogramgroup}). This function provides a quick insight about the impact of the originating thread, or input data on the zone performance. Clicking the \RMB{} right mouse button on the group names area will reset the group selection.