diff --git a/types/wlr_output_layout.c b/types/wlr_output_layout.c
index 553275d7..c0f7134e 100644
--- a/types/wlr_output_layout.c
+++ b/types/wlr_output_layout.c
@@ -380,22 +380,24 @@ struct wlr_box *wlr_output_layout_get_box(
 		}
 	} else {
 		// layout extents
-		int min_x = INT_MAX, min_y = INT_MAX;
-		int max_x = INT_MIN, max_y = INT_MIN;
-		wl_list_for_each(l_output, &layout->outputs, link) {
-			struct wlr_box *box = output_layout_output_get_box(l_output);
-
-			if (box->x < min_x) {
-				min_x = box->x;
-			}
-			if (box->y < min_y) {
-				min_y = box->y;
-			}
-			if (box->x + box->width > max_x) {
-				max_x = box->x + box->width;
-			}
-			if (box->y + box->height > max_y) {
-				max_y = box->y + box->height;
+		int min_x = 0, max_x = 0, min_y = 0, max_y = 0;
+		if (!wl_list_empty(&layout->outputs)) {
+			min_x = min_y = INT_MAX;
+			max_x = max_y = INT_MIN;
+			wl_list_for_each(l_output, &layout->outputs, link) {
+				struct wlr_box *box = output_layout_output_get_box(l_output);
+				if (box->x < min_x) {
+					min_x = box->x;
+				}
+				if (box->y < min_y) {
+					min_y = box->y;
+				}
+				if (box->x + box->width > max_x) {
+					max_x = box->x + box->width;
+				}
+				if (box->y + box->height > max_y) {
+					max_y = box->y + box->height;
+				}
 			}
 		}