diff --git a/dwl.c b/dwl.c
index 04c1820..8a28ead 100644
--- a/dwl.c
+++ b/dwl.c
@@ -689,6 +689,7 @@ chvt(const Arg *arg)
 void
 checkidleinhibitor(struct wlr_surface *exclude)
 {
+	Client *c = focustop(selmon, 0);
 	int inhibited = 0, unused_lx, unused_ly;
 	struct wlr_idle_inhibitor_v1 *inhibitor;
 	wl_list_for_each(inhibitor, &idle_inhibit_mgr->inhibitors, link) {
@@ -701,6 +702,9 @@ checkidleinhibitor(struct wlr_surface *exclude)
 		}
 	}
 
+	if (c && c->isfullscreen)
+		inhibited = 1;
+
 	wlr_idle_notifier_v1_set_inhibited(idle_notifier, inhibited);
 }