diff --git a/types/glob/glob-tests.ts b/types/glob/glob-tests.ts
index e67e41317b..c73ac10815 100644
--- a/types/glob/glob-tests.ts
+++ b/types/glob/glob-tests.ts
@@ -29,5 +29,6 @@ const Glob = glob.Glob;
 	console.log("after");
 })();
 
+declare const ignore: ReadonlyArray<string>;
 glob.sync('/foo/*', {realpath: true, realpathCache: {'/foo/bar': '/bar'}, ignore: '/foo/baz'});
-glob.sync('/*', {nodir: true, cache: {'/': ['bar', 'baz']}, statCache: {'/foo/bar': false, '/foo/baz': {isDirectory() { return true; }}}});
+glob.sync('/*', {ignore, nodir: true, cache: {'/': ['bar', 'baz']}, statCache: {'/foo/bar': false, '/foo/baz': {isDirectory() { return true; }}}});
diff --git a/types/glob/index.d.ts b/types/glob/index.d.ts
index 9b0e1e5cb8..fc8c98853d 100644
--- a/types/glob/index.d.ts
+++ b/types/glob/index.d.ts
@@ -33,7 +33,7 @@ declare namespace G {
         stat?: boolean;
         silent?: boolean;
         strict?: boolean;
-        cache?: { [path: string]: boolean | 'DIR' | 'FILE' | string[] };
+        cache?: { [path: string]: boolean | 'DIR' | 'FILE' | ReadonlyArray<string> };
         statCache?: { [path: string]: false | { isDirectory(): boolean} | undefined };
         symlinks?: { [path: string]: boolean | undefined };
         realpathCache?: { [path: string]: string };
@@ -47,7 +47,7 @@ declare namespace G {
         nocase?: boolean;
         matchBase?: any;
         nodir?: boolean;
-        ignore?: string | string[];
+        ignore?: string | ReadonlyArray<string>;
         follow?: boolean;
         realpath?: boolean;
         nonegate?: boolean;
@@ -70,7 +70,7 @@ declare namespace G {
         minimatch: minimatch.IMinimatch;
         options: IOptions;
         aborted: boolean;
-        cache: { [path: string]: boolean | 'DIR' | 'FILE' | string[] };
+        cache: { [path: string]: boolean | 'DIR' | 'FILE' | ReadonlyArray<string> };
         statCache: { [path: string]: false | { isDirectory(): boolean; } | undefined };
         symlinks: { [path: string]: boolean | undefined };
         realpathCache: { [path: string]: string };