diff --git a/dwm.c b/dwm.c
index 04506e1..dace13f 100644
--- a/dwm.c
+++ b/dwm.c
@@ -672,6 +672,8 @@ clientmessage(XEvent *e)
 			updatesystrayicongeom(c, wa.width, wa.height);
 			XAddToSaveSet(dpy, c->win);
 			XSelectInput(dpy, c->win, StructureNotifyMask | PropertyChangeMask | ResizeRedirectMask);
+            XClassHint ch = {"dwmtray", "dwmtray"};
+            XSetClassHint(dpy, c->win, &ch);
 			XReparentWindow(dpy, c->win, systray->win, 0, 0);
 			/* use parents background color */
 			swa.background_pixel  = scheme[SchemeNorm][ColBg].pixel;