diff --git a/typings/index.d.ts b/typings/index.d.ts
index 174510d81..d5f8dcf58 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -37,7 +37,7 @@ declare module 'discord.js' {
 
 	export class ActivityFlags extends BitField<ActivityFlagsString> {
 		public static FLAGS: Record<ActivityFlagsString, number>;
-		public static resolve(permission: BitFieldResolvable<ActivityFlagsString>): number;
+		public static resolve(bit?: BitFieldResolvable<ActivityFlagsString>): number;
 	}
 
 	export class APIMessage {
@@ -113,7 +113,7 @@ declare module 'discord.js' {
 		public valueOf(): number;
 		public [Symbol.iterator](): Iterator<S>;
 		public static FLAGS: object;
-		public static resolve(bit?: BitFieldResolvable<string>): number;
+		public static resolve(bit?: BitFieldResolvable<any>): number;
 	}
 
 	export class CategoryChannel extends GuildChannel {
@@ -1030,7 +1030,7 @@ declare module 'discord.js' {
 
 	export class Speaking extends BitField<SpeakingString> {
 		public static FLAGS: Record<SpeakingString, number>;
-		public static resolve(permission: BitFieldResolvable<SpeakingString>): number;
+		public static resolve(bit?: BitFieldResolvable<SpeakingString>): number;
 	}
 
 	export class Structures {