diff --git a/packages/gallery/src/services/style.js b/packages/gallery/src/services/style.js
index b1030c1..7bd5f24 100644
--- a/packages/gallery/src/services/style.js
+++ b/packages/gallery/src/services/style.js
@@ -24,8 +24,19 @@ export function el(sig, ...attrsOrChildren) {
 			delete attrs.css;
 			delete attrs.styles;
 		}
+		if (isObject(attrs.class)) {
+			const oldClassObj = attrs.class;
+			attrs.class = Object.entries(oldClassObj)
+				.reduce((acc, [key, value]) => {
+					if (value) {
+						acc.push(key);
+					}
+					return acc;
+				}, [])
+				.join(' ');
+		}
 	}
-	return defineElement(sig, attrs, ...children);
+	return defineElement(sig, attrs, children);
 }
 
 export function styled(styles, tagName = 'div') {