diff --git a/types/wlr_output.c b/types/wlr_output.c
index 15b2f402..08d32963 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -503,21 +503,12 @@ void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
 
 void wlr_output_transform_apply_to_box(enum wl_output_transform transform,
 		struct wlr_box *box, struct wlr_box *dest) {
-	switch (transform) {
-	case WL_OUTPUT_TRANSFORM_NORMAL:
-	case WL_OUTPUT_TRANSFORM_180:
-	case WL_OUTPUT_TRANSFORM_FLIPPED:
-	case WL_OUTPUT_TRANSFORM_FLIPPED_180:
+	if (transform % 2 == 0) {
 		dest->width = box->width;
 		dest->height = box->height;
-		break;
-	case WL_OUTPUT_TRANSFORM_90:
-	case WL_OUTPUT_TRANSFORM_270:
-	case WL_OUTPUT_TRANSFORM_FLIPPED_90:
-	case WL_OUTPUT_TRANSFORM_FLIPPED_270:
+	} else {
 		dest->width = box->height;
 		dest->height = box->width;
-		break;
 	}
 
 	switch (transform) {
@@ -552,5 +543,6 @@ void wlr_output_transform_apply_to_box(enum wl_output_transform transform,
 	case WL_OUTPUT_TRANSFORM_FLIPPED_270:
 		dest->x = box->height - box->y;
 		dest->y = box->width - box->x;
+		break;
 	}
 }