diff --git a/source/Ox.UI/css/theme.css b/source/Ox.UI/css/theme.css
index 6811b1de..12709858 100644
--- a/source/Ox.UI/css/theme.css
+++ b/source/Ox.UI/css/theme.css
@@ -199,8 +199,8 @@ Calendar
     box-shadow: inset 0 0 2px $calendarOverlayEvenShadow;
 }
 
-.OxThemeModern .OxCalendar .OxCalendarControl,
-.OxThemeModern .OxCalendar .OxEventControl {
+.$themeClass .OxCalendar .OxCalendarControl,
+.$themeClass .OxCalendar .OxEventControl {
     border-color: calendarControlBorder;
     background-image: -moz-linear-gradient(top, $calendarControlGradient);
     background-image: -o-linear-gradient(top, $calendarControlGradient);