diff --git a/lib/core/InterceptorManager.js b/lib/core/InterceptorManager.js
index c3e10ef..5ec97c3 100644
--- a/lib/core/InterceptorManager.js
+++ b/lib/core/InterceptorManager.js
@@ -28,6 +28,8 @@ InterceptorManager.prototype.use = function use(fulfilled, rejected, options) {
  * Remove an interceptor from the stack
  *
  * @param {Number} id The ID that was returned by `use`
+ *
+ * @returns {Boolean} `true` if the interceptor was removed, `false` otherwise
  */
 InterceptorManager.prototype.eject = function eject(id) {
   if (this.handlers[id]) {
@@ -37,6 +39,8 @@ InterceptorManager.prototype.eject = function eject(id) {
 
 /**
  * Clear all interceptors from the stack
+ *
+ * @returns {void}
  */
 InterceptorManager.prototype.clear = function clear() {
   if (this.handlers) {
@@ -51,6 +55,8 @@ InterceptorManager.prototype.clear = function clear() {
  * interceptors that may have become `null` calling `eject`.
  *
  * @param {Function} fn The function to call for each interceptor
+ *
+ * @returns {void}
  */
 InterceptorManager.prototype.forEach = function forEach(fn) {
   utils.forEach(this.handlers, function forEachHandler(h) {