diff --git a/src/harness/unittests/tsserverProjectSystem.ts b/src/harness/unittests/tsserverProjectSystem.ts
index c79d6c555e3..4b3fa82d79f 100644
--- a/src/harness/unittests/tsserverProjectSystem.ts
+++ b/src/harness/unittests/tsserverProjectSystem.ts
@@ -1455,7 +1455,7 @@ namespace ts.projectSystem {
             checkProjectActualFiles(projectService.inferredProjects[1], [file3.path]);
         });
 
-        it("ignores files excluded by the safe type list", () => {
+        it("ignores files excluded by a custom safe type list", () => {
             const file1 = {
                 path: "/a/b/f1.ts",
                 content: "export let x = 5"
@@ -1477,6 +1477,44 @@ namespace ts.projectSystem {
             }
         });
 
+        it("ignores files excluded by the default type list", () => {
+            const file1 = {
+                path: "/a/b/f1.ts",
+                content: "export let x = 5"
+            };
+            const minFile = {
+                path: "/c/moment.min.js",
+                content: "unspecified"
+            };
+            const kendoFile1 = {
+                path: "/q/lib/kendo/kendo.all.min.js",
+                content: "unspecified"
+            };
+            const kendoFile2 = {
+                path: "/q/lib/kendo/kendo.ui.min.js",
+                content: "unspecified"
+            };
+            const officeFile1 = {
+                path: "/scripts/Office/1/excel-15.debug.js",
+                content: "unspecified"
+            };
+            const officeFile2 = {
+                path: "/scripts/Office/1/powerpoint.js",
+                content: "unspecified"
+            };
+            const files = [file1, minFile, kendoFile1, kendoFile2, officeFile1, officeFile2];
+            const host = createServerHost(files);
+            const projectService = createProjectService(host);
+            try {
+                projectService.openExternalProject({ projectFileName: "project", options: {}, rootFiles: toExternalFiles(files.map(f => f.path)) });
+                const proj = projectService.externalProjects[0];
+                assert.deepEqual(proj.getFileNames(/*excludeFilesFromExternalLibraries*/ true), [file1.path]);
+                assert.deepEqual(proj.getTypeAcquisition().include, ["kendo-ui", "office"]);
+            } finally {
+                projectService.resetSafeList();
+            }
+        });
+
         it("open file become a part of configured project if it is referenced from root file", () => {
             const file1 = {
                 path: "/a/b/f1.ts",
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 582c8974cec..3b79d6edca3 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -61,6 +61,24 @@ namespace ts.server {
         "smart": IndentStyle.Smart
     });
 
+    /**
+     * How to understand this block:
+     *  * The 'match' property is a regexp that matches a filename.
+     *  * If 'match' is successful, then:
+     *     * All files from 'exclude' are removed from the project. See below.
+     *     * All 'types' are included in ATA
+     *  * What the heck is 'exclude' ?
+     *     * An array of an array of strings and numbers
+     *     * Each array is:
+     *       * An array of strings and numbers
+     *       * The strings are literals
+     *       * The numbers refer to capture group indices from the 'match' regexp
+     *          * Remember that '1' is the first group
+     *       * These are concatenated together to form a new regexp
+     *       * Filenames matching these regexps are excluded from the project
+     * This default value is tested in tsserverProjectSystem.ts; add tests there
+     *   if you are changing this so that you can be sure your regexp works!
+     */
     const defaultTypeSafeList: SafeList = {
         "jquery": {
             // jquery files can have names like "jquery-1.10.2.min.js" (or "jquery.intellisense.js")
@@ -84,6 +102,11 @@ namespace ts.server {
             "match": /^(.*\/office\/1)\/excel-\d+\.debug\.js$/i, // Office NuGet package is installed under a "1/office" folder
             "exclude": [["^", 1, "/.*"]],                     // Exclude that whole folder if the file indicated above is found in it
             "types": ["office"]                               // @types package to fetch instead
+        },
+        "Minified files": {
+            // e.g. /whatever/blah.min.js
+            "match": /^(.+\.min\.js)$/i,
+            "exclude": [["^", 1, "$"]]
         }
     };
 
@@ -1507,7 +1530,7 @@ namespace ts.server {
 
                 // Copy back this field into the project if needed
                 if (types.length > 0) {
-                    proj.typeAcquisition = proj.typeAcquisition || { };
+                    proj.typeAcquisition = proj.typeAcquisition || {};
                     proj.typeAcquisition.include = types;
                 }
             }