diff --git a/src/main.c b/src/main.c
index 6d1ad0a..21a387b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -244,6 +244,10 @@ static void handle_unmap_notify(XUnmapEvent *ev)
         return;
     }
 
+    if (c->flags & (CLIENT_MAXIMIZED | CLIENT_FULLSCREEN)) {
+        return;
+    }
+
     client_unmanage(c);
 }