diff --git a/matlab/reports/@graph/graph.m b/matlab/reports/@graph/graph.m
index 72273c7f9..00b6537c8 100644
--- a/matlab/reports/@graph/graph.m
+++ b/matlab/reports/@graph/graph.m
@@ -128,7 +128,7 @@ assert(isempty(o.yrange) || (isfloat(o.yrange) && length(o.yrange) == 2 && ...
 assert(isempty(o.data) || isa(o.data, 'dynSeries'), ['@graph.graph: data must ' ...
                     'be a dynSeries']);
 assert(isempty(o.seriesToUse) || iscellstr(o.seriesToUse), ['@graph.graph: ' ...
-                    'series to use must be a cell array of string(s)']);
+                    'seriesToUse must be a cell array of string(s)']);
 
 assert(isempty(o.graphSize) || ((isfloat(o.graphSize) && length(o.graphSize) == 2)),...
        ['@graph.graph: graphSize is specified as an array with two float ' ...