diff --git a/exorcist/exorcist-tests.ts b/exorcist/exorcist-tests.ts
new file mode 100644
index 0000000000..26a1be0e07
--- /dev/null
+++ b/exorcist/exorcist-tests.ts
@@ -0,0 +1,15 @@
+/// <reference path="exorcist.d.ts" />
+
+import exorcist = require("exorcist");
+
+module ExorcistTest {
+
+    function pullSourceMaps(srcPath: string, projRoot: string) {
+        exorcist(srcPath, undefined, projRoot);
+        exorcist(srcPath, null, projRoot, null, true);
+        exorcist(srcPath, null, projRoot, "./");
+    }
+
+}
+
+export = ExorcistTest;
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diff --git a/exorcist/exorcist.d.ts b/exorcist/exorcist.d.ts
new file mode 100644
index 0000000000..c9c576ac12
--- /dev/null
+++ b/exorcist/exorcist.d.ts
@@ -0,0 +1,21 @@
+// Type definitions for exorcist v3.7.x
+// Project: https://github.com/substack/watchify
+// Definitions by: TeamworkGuy2 <https://github.com/TeamworkGuy2>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference path="../through/through.d.ts" />
+
+declare module 'exorcist' {
+    import through = require("through");
+
+    /** Externalizes the source map found inside a stream to an external .map file.
+     * Works with both JavaScript and CSS input streams
+     * @param file full path to the map file to which to write the extracted source map
+     * @param [url] full URL to the map file, set as sourceMappingURL in the streaming output (default: file)
+     * @param [root] root URL for loading relative source paths, set as sourceRoot in the source map (default: "")
+     * @param [base] base path for calculating relative source paths (default: use absolute paths)
+     * @param [errorOnMissing] when truthy, causes 'error' to be emitted instead of 'missing-map' if no map was found in the stream (default: falsey)
+     */
+    function exorcist(file: string, url?: string, root?: string, base?: string, errorOnMissing?: boolean): through.ThroughStream;
+    export = exorcist;
+}
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