diff --git a/packages/material-ui/src/Button/Button.js b/packages/material-ui/src/Button/Button.js
index 4c1092028b3d23..6e5aad2b0578ad 100644
--- a/packages/material-ui/src/Button/Button.js
+++ b/packages/material-ui/src/Button/Button.js
@@ -13,7 +13,7 @@ export const styles = theme => ({
     ...theme.typography.button,
     lineHeight: '1.4em', // Improve readability for multiline button.
     boxSizing: 'border-box',
-    minWidth: 88,
+    minWidth: 64,
     minHeight: 36,
     padding: '8px 16px',
     borderRadius: theme.shape.borderRadius,
diff --git a/packages/material-ui/src/DialogActions/DialogActions.js b/packages/material-ui/src/DialogActions/DialogActions.js
index c13b9c792d4ec3..b2d2416420be50 100644
--- a/packages/material-ui/src/DialogActions/DialogActions.js
+++ b/packages/material-ui/src/DialogActions/DialogActions.js
@@ -15,7 +15,6 @@ export const styles = {
   },
   action: {
     margin: '0 4px',
-    minWidth: 64,
   },
 };