diff --git a/src/api/search.js b/src/api/search.js
index 8dad8eb44e..18bd9fa160 100644
--- a/src/api/search.js
+++ b/src/api/search.js
@@ -20,6 +20,7 @@ searchApi.categories = async (caller, data) => {
 	data.states = (data.states || ['watching', 'notwatching', 'ignoring']).map(
 		state => categories.watchStates[state]
 	);
+	data.parentCid = parseInt(data.parentCid || 0, 10);
 
 	if (data.search) {
 		({ cids, matchedCids } = await findMatchedCids(caller.uid, data));