diff --git a/types/gulp-mustache/index.d.ts b/types/gulp-mustache/index.d.ts
index 3b01944b19..13e0198558 100644
--- a/types/gulp-mustache/index.d.ts
+++ b/types/gulp-mustache/index.d.ts
@@ -16,7 +16,7 @@ declare namespace GulpMustache {
 
     interface Options {
         extension?: string;
-        tags?: ReadonlyArray<string> | undefined;
+        tags?: ReadonlyArray<string>;
     }
 }
 
diff --git a/types/gulp/index.d.ts b/types/gulp/index.d.ts
index 465cceb4e5..161cd998c4 100644
--- a/types/gulp/index.d.ts
+++ b/types/gulp/index.d.ts
@@ -33,14 +33,12 @@ declare namespace GulpClient {
          * Can be piped to and it will write files. Re-emits all data passed to it so you can pipe to multiple folders.
          * Folders that don't exist will be created.
          * @param path The path (output folder) to write files to. Or a function that returns it, the function will be provided a vinyl File instance.
-         * @param options
          */
         dest: DestMethod;
 
         /**
          * Functions exactly like gulp.dest, but will create symlinks instead of copying a directory.
          * @param folder A folder path or a function that receives in a file and returns a folder path.
-         * @param options
          */
         symlink: typeof vfs.symlink;