diff --git a/docs/data/material/migration/upgrade-to-v9/upgrade-to-v9.md b/docs/data/material/migration/upgrade-to-v9/upgrade-to-v9.md
index aff1cd76c9d1a7..c3eb5756c8f156 100644
--- a/docs/data/material/migration/upgrade-to-v9/upgrade-to-v9.md
+++ b/docs/data/material/migration/upgrade-to-v9/upgrade-to-v9.md
@@ -164,6 +164,10 @@ See the [Grid v2 migration guide](/material-ui/migration/upgrade-to-grid-v2/) fo
 
 `MuiGridLegacy` has also been removed from the theme `components` types (`ComponentsProps`, `ComponentsOverrides`, and `ComponentsVariants`).
 
+### List
+
+`ListItemIcon` default min-width changes to `36px` (was `56px`) to be consistent with the menu item and uses `theme.spacing` instead of a hardcoded number.
+
 ### TablePagination numbers are formatted by default
 
 Pagination numbers in `TablePagination` are now formatted using `Intl.NumberFormat` according to the locale.
diff --git a/packages/mui-material/src/ListItemIcon/ListItemIcon.js b/packages/mui-material/src/ListItemIcon/ListItemIcon.js
index 00cf8c2a869d7d..81aeb8629aede4 100644
--- a/packages/mui-material/src/ListItemIcon/ListItemIcon.js
+++ b/packages/mui-material/src/ListItemIcon/ListItemIcon.js
@@ -29,7 +29,7 @@ const ListItemIconRoot = styled('div', {
   },
 })(
   memoTheme(({ theme }) => ({
-    minWidth: 56,
+    minWidth: theme.spacing(4.5),
     color: (theme.vars || theme).palette.action.active,
     flexShrink: 0,
     display: 'inline-flex',