diff --git a/packages/block-library/src/heading/block.json b/packages/block-library/src/heading/block.json
index ecb809e18fd45..89c1514808911 100644
--- a/packages/block-library/src/heading/block.json
+++ b/packages/block-library/src/heading/block.json
@@ -50,6 +50,7 @@
 			"__experimentalFontWeight": true,
 			"__experimentalLetterSpacing": true,
 			"__experimentalTextTransform": true,
+			"__experimentalTextDecoration": true,
 			"__experimentalDefaultControls": {
 				"fontSize": true,
 				"fontAppearance": true,