diff --git a/packages/block-editor/src/utils/transform-styles/ast/parse.js b/packages/block-editor/src/utils/transform-styles/ast/parse.js
index 11e8d22a378475..db7dbcbf0af4d2 100644
--- a/packages/block-editor/src/utils/transform-styles/ast/parse.js
+++ b/packages/block-editor/src/utils/transform-styles/ast/parse.js
@@ -244,7 +244,7 @@ export default function( css, options ) {
 		}
 
 		// val
-		const val = match( /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^\)]*?\)|[^};])+)/ );
+		const val = match( /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|\([^\)]*?['"]\)|[^};])+)/ );
 
 		const ret = pos( {
 			type: 'declaration',