diff --git a/src/projector/otto.ts b/src/projector/otto.ts
index 7163862..43c986b 100644
--- a/src/projector/otto.ts
+++ b/src/projector/otto.ts
@@ -6,6 +6,9 @@ import {fsLstatExists} from '@shockpkg/archive-files';
 import {Projector} from '../projector';
 import {pathRelativeBase, trimExtension} from '../util';
 
+/**
+ * Include Xtra mapping.
+ */
 export interface IIncludeXtraMapping {
 	/**
 	 * Source path, case insensitive.
@@ -20,6 +23,9 @@ export interface IIncludeXtraMapping {
 	dest: string | null;
 }
 
+/**
+ * Include Xtra mapping, best match.
+ */
 export interface IIncludeXtraMappingBest {
 	/**
 	 * Map instance.
@@ -32,6 +38,9 @@ export interface IIncludeXtraMappingBest {
 	relative: string;
 }
 
+/**
+ * Include Xtras.
+ */
 export interface IIncludeXtras {
 	[key: string]: string | null;
 }
diff --git a/src/util/mac.ts b/src/util/mac.ts
index 53e116c..14ebef5 100644
--- a/src/util/mac.ts
+++ b/src/util/mac.ts
@@ -11,6 +11,9 @@ const MH_CIGAM_64 = 0xcffaedfe;
 const CPU_TYPE_POWERPC = 0x00000012;
 const CPU_TYPE_I386 = 0x00000007;
 
+/**
+ * Mach-O type.
+ */
 export interface IMachoType {
 	/**
 	 * CPU type.
diff --git a/src/util/windows.ts b/src/util/windows.ts
index 26b7d67..80599ca 100644
--- a/src/util/windows.ts
+++ b/src/util/windows.ts
@@ -19,6 +19,9 @@ const IMAGE_SCN_CNT_CODE = 0x00000020;
 const IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040;
 const IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080;
 
+/**
+ * PE Resource replace config.
+ */
 export interface IPeResourceReplace {
 	/**
 	 * Replace icons if not null.
@@ -366,6 +369,9 @@ export async function windowsLauncher(
 	return new Uint8Array(exeData);
 }
 
+/**
+ * Patcher patch.
+ */
 interface IPatcherPatch {
 	/**
 	 * The bytes to find.