diff --git a/src/structures/channel.ts b/src/structures/channel.ts
index 384042cc..dee602ef 100644
--- a/src/structures/channel.ts
+++ b/src/structures/channel.ts
@@ -886,7 +886,7 @@ export class ChannelDM extends ChannelBase {
   readonly _keys = keysChannelDm;
   type = ChannelTypes.DM;
 
-  lastMessageId?: null | string;
+  declare lastMessageId?: null | string;
 
   constructor(
     client: ShardClient,
@@ -1022,7 +1022,7 @@ export class ChannelDMGroup extends ChannelDM {
   readonly _keys = keysChannelDmGroup;
   type = ChannelTypes.GROUP_DM;
 
-  applicationId?: string;
+  declare applicationId?: string;
   icon: null | string = null;
   ownerId: string = '';
 
@@ -1641,11 +1641,11 @@ export class ChannelGuildThread extends ChannelGuildBase {
   readonly _keys = keysChannelGuildThread;
   type = ChannelTypes.GUILD_PUBLIC_THREAD;
 
-  member?: ThreadMember;
+  declare member?: ThreadMember;
   memberCount: number = 0;
   messageCount: number = 0;
   ownerId: string = '';
-  threadMetadata!: ThreadMetadata;
+  declare threadMetadata: ThreadMetadata;
 
   constructor(
     client: ShardClient,
diff --git a/src/structures/member.ts b/src/structures/member.ts
index d3f352de..114b0821 100644
--- a/src/structures/member.ts
+++ b/src/structures/member.ts
@@ -77,7 +77,7 @@ export class Member extends UserMixin {
   nick: null | string = null;
   pending: boolean = false;
   premiumSinceUnix: number = 0;
-  user!: User;
+  declare user: User;
 
   constructor(
     client: ShardClient,
diff --git a/src/structures/team.ts b/src/structures/team.ts
index e585bb06..2b2fbc53 100644
--- a/src/structures/team.ts
+++ b/src/structures/team.ts
@@ -144,7 +144,7 @@ export class TeamMember extends UserMixin {
   membershipState: TeamMembershipStates = TeamMembershipStates.BASE;
   permissions!: BaseSet<string>;
   teamId: string = '';
-  user!: User;
+  declare user: User;
 
   constructor(
     client: ShardClient,