diff --git a/matlab/rplot.m b/matlab/rplot.m
index 0f49ca29a354aa1d30c1f1de877e688a925f86fb..2605e7f5a485b87804e940f4006fb0782c34483b 100644
--- a/matlab/rplot.m
+++ b/matlab/rplot.m
@@ -129,7 +129,7 @@ elseif options_.rplottype == 2
         end
         xlabel('Periods') ;
         if options_.TeX
-            ylabel([s1_TeX{j}],'Interpreter','latex') ;
+            ylabel(['$' s1_TeX{j} '$'],'Interpreter','latex') ;
             title(['Plot of $' s1_TeX{j} '$'],'Interpreter','latex') ;
         else
             ylabel([s1{j}],'Interpreter','none') ;