diff --git a/lib/ContextModule.js b/lib/ContextModule.js
index 9db2914b713..c2e4b81a3f8 100644
--- a/lib/ContextModule.js
+++ b/lib/ContextModule.js
@@ -12,11 +12,28 @@ const contextify = require("./util/identifier").contextify;
 
 /** @typedef {import("./dependencies/ContextElementDependency")} ContextElementDependency */
 
+/**
+ * @callback ResolveDependenciesCallback
+ * @param {Error=} err
+ * @param {ContextElementDependency[]} dependencies
+ */
+
+/**
+ * @callback ResolveDependencies
+ * @param {TODO} fs
+ * @param {TODO} options
+ * @param {ResolveDependenciesCallback} callback
+ */
+
 class ContextModule extends Module {
 	// type ContextMode = "sync" | "eager" | "weak" | "async-weak" | "lazy" | "lazy-once"
 	// type ContextOptions = { resource: string, recursive: boolean, regExp: RegExp, addon?: string, mode?: ContextMode, chunkName?: string, include?: RegExp, exclude?: RegExp, groupOptions?: Object }
 	// resolveDependencies: (fs: FS, options: ContextOptions, (err: Error?, dependencies: Dependency[]) => void) => void
 	// options: ContextOptions
+	/**
+	 * @param {ResolveDependencies} resolveDependencies function to get dependencies in this context
+	 * @param {TODO} options options object
+	 */
 	constructor(resolveDependencies, options) {
 		let resource;
 		let resourceQuery;
@@ -194,7 +211,9 @@ class ContextModule extends Module {
 
 			// enhance dependencies with meta info
 			for (const dep of dependencies) {
-				dep.loc = dep.userRequest;
+				dep.loc = {
+					name: dep.userRequest
+				};
 				dep.request = this.options.addon + dep.request;
 			}
 
diff --git a/lib/Dependency.js b/lib/Dependency.js
index 4b731a7323c..2f0c8fe0905 100644
--- a/lib/Dependency.js
+++ b/lib/Dependency.js
@@ -30,7 +30,7 @@ const DependencyReference = require("./dependencies/DependencyReference");
 
 /** @typedef {Object} SynteticDependencyLocation
  *  @property {string} name
- *  @property {number} index
+ *  @property {number=} index
  */
 
 /** @typedef {SynteticDependencyLocation|RealDependencyLocation} DependencyLocation */