diff --git a/packages/mdc-textfield/_filled-text-field-theme.scss b/packages/mdc-textfield/_filled-text-field-theme.scss
index 0f289812921..03de3879b68 100644
--- a/packages/mdc-textfield/_filled-text-field-theme.scss
+++ b/packages/mdc-textfield/_filled-text-field-theme.scss
@@ -126,6 +126,7 @@ $_light-theme: (
   supporting-text-size: null,
   supporting-text-tracking: null,
   supporting-text-weight: null,
+  supporting-text-type: null,
   trailing-icon-color: null,
   trailing-icon-size: null,
 );