diff --git a/src/js/itemAvailability.js b/src/js/itemAvailability.js
index 3550d090ca440eff40134ded7145fdd674266d5a..a43564b829d7bcffebca45c0b211c74b070a738c 100644
--- a/src/js/itemAvailability.js
+++ b/src/js/itemAvailability.js
@@ -170,6 +170,11 @@ window.isItemAccessible = function(string) {
 	}
 };
 
+/*
+ * @param {App.Entity.SlaveState} slave
+ * @param {string} prosthetic
+ * @returns {boolean}
+ */
 window.isProstheticAvailable = function(slave, prosthetic) {
 	return slave.readyProsthetics.findIndex(function(p) { return p.id === prosthetic; }) !== -1;
 };