diff --git a/packages/block-library/src/navigation/block.json b/packages/block-library/src/navigation/block.json
index 9aacf07419e53..4b3825042904b 100644
--- a/packages/block-library/src/navigation/block.json
+++ b/packages/block-library/src/navigation/block.json
@@ -94,6 +94,7 @@
 			"__experimentalFontWeight": true,
 			"__experimentalTextTransform": true,
 			"__experimentalFontFamily": true,
+			"__experimentalLetterSpacing": true,
 			"__experimentalTextDecoration": true,
 			"__experimentalSkipSerialization": [ "textDecoration" ],
 			"__experimentalDefaultControls": {