diff --git a/docs/spec.md b/docs/spec.md
index 6c2a1f45490..f4b3fbf231c 100644
--- a/docs/spec.md
+++ b/docs/spec.md
@@ -5064,7 +5064,7 @@ The following diagram shows how elements in `result` are computed from
 More formally:
 
 * `selected_values = reduce_window_without_init(...)` with the following inputs:
-  * `inputs = [operand].
+  * `inputs = [operand].`
   * `window_dimensions`, `window_strides`, and `padding` which are used as is.
   * `base_dilations = windows_dilations = 1`.
   * `body` is defined as: