diff --git a/maomao.c b/maomao.c
index 55051eee..d55a4103 100644
--- a/maomao.c
+++ b/maomao.c
@@ -3487,7 +3487,7 @@ keypress(struct wl_listener *listener, void *data)
     event->state == WL_KEYBOARD_KEY_STATE_RELEASED &&
     (keycode == 133 || keycode == 37 || keycode == 64 || keycode == 50 ||
      keycode == 134 || keycode == 105 || keycode == 108 || keycode == 62) &&
-    selmon->sel) {
+    selmon && selmon->sel) {
     if (selmon->isoverview && selmon->sel) {
       toggleoverview(&(Arg){.i = -1});
     }
@@ -3497,7 +3497,7 @@ keypress(struct wl_listener *listener, void *data)
   if (!locked && event->state == WL_KEYBOARD_KEY_STATE_RELEASED &&
       (keycode == 133 || keycode == 37 || keycode == 64 || keycode == 50 ||
        keycode == 134 || keycode == 105 || keycode == 108 || keycode == 62) &&
-      selmon->sel) {
+      selmon && selmon->sel) {
     dwl_input_method_relay_set_focus(input_relay, client_surface(selmon->sel));
   }
 #endif
@@ -4908,27 +4908,27 @@ void setsmfact(const Arg *arg) {
   arrange(selmon, false);
 }
 
-void setmon(Client *c, Monitor *m, uint32_t newtags) {
-  Monitor *oldmon = c->mon;
+void
+setmon(Client *c, Monitor *m, uint32_t newtags)
+{
+	Monitor *oldmon = c->mon;
 
-  if (oldmon == m)
-    return;
-  c->mon = m;
-  c->prev = c->geom;
+	if (oldmon == m)
+		return;
+	c->mon = m;
+	c->prev = c->geom;
 
-  /* Scene graph sends surface leave/enter events on move and resize */
-  if (oldmon)
-    arrange(oldmon, false);
-  if (m) {
-    /* Make sure window actually overlaps with the monitor */
-    resize(c, c->geom, 0);
-    c->tags = newtags
-                  ? newtags
-                  : m->tagset[m->seltags]; /* assign tags of target monitor */
-    setfullscreen(c, c->isfullscreen);     /* This will call arrange(c->mon) */
-    setfloating(c, c->isfloating);
-  }
-  focusclient(focustop(selmon), 1);
+	/* Scene graph sends surface leave/enter events on move and resize */
+	if (oldmon)
+		arrange(oldmon,false);
+	if (m) {
+		/* Make sure window actually overlaps with the monitor */
+		resize(c, c->geom, 0);
+		c->tags = newtags ? newtags : m->tagset[m->seltags]; /* assign tags of target monitor */
+		setfullscreen(c, c->isfullscreen); /* This will call arrange(c->mon) */
+		setfloating(c, c->isfloating);
+	}
+	focusclient(focustop(selmon), 1);
 }
 
 void