diff --git a/documentation/guides/migrating-from-v8-to-v9.md b/documentation/guides/migrating-from-v8-to-v9.md
index 788f27c1b86..b0e40056bb7 100644
--- a/documentation/guides/migrating-from-v8-to-v9.md
+++ b/documentation/guides/migrating-from-v8-to-v9.md
@@ -154,7 +154,7 @@ A list of functions/mixins and their value equivalents or new token values.
 This function has been deprecated, but the definition can be copied and used locally.
 | Function | Source |
 | -------- | -------------------- |
-| `em()` | [definition](https://github.com/Shopify/polaris-react/blob/b443d114d447df15d9e72914c8ca5058439a175e/documentation/guides/legacy-polaris-v8-public-api.scss#L333) |
+| `em()` | [definition](https://github.com/Shopify/polaris-react/blob/b443d114d447df15d9e72914c8ca5058439a175e/documentation/guides/legacy-polaris-v8-public-api.scss#L333-L352) |
 
 #### `easing()`
 
@@ -275,13 +275,20 @@ For `<border-width>` instances that are hard coded values, see if you can replac
 | `ms-high-contrast-color('button-text-background')`   | `buttonFace`            |
 | `ms-high-contrast-color('background')`               | `window`                |
 
+#### `px()`
+
+This function has been deprecated, but the definition can be copied and used locally.
+| Function | Source |
+| -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `px()` | [definition](https://github.com/Shopify/polaris-react/blob/b443d114d447df15d9e72914c8ca5058439a175e/documentation/guides/legacy-polaris-v8-public-api.scss##L313-L331) |
+
 #### `rem()`
 
 This function has been deprecated, but the definition can be copied and used locally.
 
-| Function | Source                                                                                                                                                           |
-| -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `rem()`  | [definition](https://github.com/Shopify/polaris-react/blob/b443d114d447df15d9e72914c8ca5058439a175e/documentation/guides/legacy-polaris-v8-public-api.scss#L293) |
+| Function | Source                                                                                                                                                                |
+| -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `rem()`  | [definition](https://github.com/Shopify/polaris-react/blob/b443d114d447df15d9e72914c8ca5058439a175e/documentation/guides/legacy-polaris-v8-public-api.scss#L293-L311) |
 
 #### `shadow()`