diff --git a/client.c b/client.c
index 91d031e..7c3b28b 100644
--- a/client.c
+++ b/client.c
@@ -245,10 +245,30 @@ manage(Window w, XWindowAttributes *wa)
 
 	XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
 			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button1, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button1, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+
 	XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
 			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button2, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button2, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+
 	XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
 			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button3, MODKEY | NUMLOCKMASK, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
+	XGrabButton(dpy, Button3, MODKEY | NUMLOCKMASK | LockMask, c->win, False, BUTTONMASK,
+			GrabModeAsync, GrabModeSync, None, None);
 
 	settags(c);
 	if(!c->isfloat)