diff --git a/vlib/arrays/arrays.v b/vlib/arrays/arrays.v
index 3e058ff152abe0..a4da4dcbaab6c0 100644
--- a/vlib/arrays/arrays.v
+++ b/vlib/arrays/arrays.v
@@ -225,6 +225,9 @@ pub:
 // Example: arrays.window([1, 2, 3, 4], size: 2) // => [[1, 2], [2, 3], [3, 4]]
 // Example: arrays.window([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], size: 3, step: 2) // => [[1, 2, 3], [3, 4, 5], [5, 6, 7], [7, 8, 9]]
 pub fn window[T](array []T, attr WindowAttribute) [][]T {
+	if array.len == 0 {
+		return [][]T{}
+	}
 	// allocate snapshot array
 	mut windows := [][]T{cap: array.len - attr.size + 1}