diff --git a/src/AccountDO.ts b/src/AccountDO.ts
index 97f0d28..c95d037 100644
--- a/src/AccountDO.ts
+++ b/src/AccountDO.ts
@@ -162,12 +162,7 @@ export class AccountDO extends DurableObject {
     this.sql.exec('INSERT OR REPLACE INTO members (user_id, role, joined_at) VALUES (?, ?, ?)', user_id, role, now);
 
     // Update SystemDO index
-    try {
-      const systemStub = this.env.SYSTEM.get(this.env.SYSTEM.idFromName('global'));
-      await systemStub.incrementMemberCount(this.ctx.id.toString());
-    } catch (e) {
-      console.error('Failed to update member count in SystemDO', e);
-    }
+    await this.syncMemberCount();
 
     // Sync with User DO
     try {
@@ -198,12 +193,7 @@ export class AccountDO extends DurableObject {
     this.sql.exec('DELETE FROM members WHERE user_id = ?', userId);
 
     // Update SystemDO index
-    try {
-      const systemStub = this.env.SYSTEM.get(this.env.SYSTEM.idFromName('global'));
-      await systemStub.decrementMemberCount(this.ctx.id.toString());
-    } catch (e) {
-      console.error('Failed to update member count in SystemDO', e);
-    }
+    await this.syncMemberCount();
 
     // Sync with User DO
     try {
@@ -216,6 +206,19 @@ export class AccountDO extends DurableObject {
     return { success: true };
   }
 
+  private async syncMemberCount() {
+    try {
+      const result = this.sql.exec('SELECT COUNT(*) as count FROM members');
+      const row = result.next().value as any;
+      const count = row ? row.count : 0;
+
+      const systemStub = this.env.SYSTEM.get(this.env.SYSTEM.idFromName('global'));
+      await systemStub.updateMemberCount(this.ctx.id.toString(), count);
+    } catch (e) {
+      console.error('Failed to update member count in SystemDO', e);
+    }
+  }
+
   async delete() {
     // Get all members to notify their UserDOs
     const members = Array.from(this.sql.exec('SELECT user_id FROM members'));
diff --git a/src/SystemDO.ts b/src/SystemDO.ts
index 9328a7e..e0739e8 100644
--- a/src/SystemDO.ts
+++ b/src/SystemDO.ts
@@ -214,12 +214,8 @@ export class SystemDO extends DurableObject {
     return { success: true };
   }
 
-  async incrementMemberCount(accountId: string) {
-    this.sql.exec('UPDATE accounts SET member_count = member_count + 1 WHERE id = ?', accountId);
-  }
-
-  async decrementMemberCount(accountId: string) {
-    this.sql.exec('UPDATE accounts SET member_count = member_count - 1 WHERE id = ?', accountId);
+  async updateMemberCount(accountId: string, count: number) {
+    this.sql.exec('UPDATE accounts SET member_count = ? WHERE id = ?', count, accountId);
   }
 
   async updateAccount(accountId: string, data: any) {
diff --git a/test/admin.spec.ts b/test/admin.spec.ts
index 5b89125..7d6f4c9 100644
--- a/test/admin.spec.ts
+++ b/test/admin.spec.ts
@@ -358,6 +358,58 @@ describe('Admin Administration', () => {
     expect(account.member_count).toBe(0);
   });
 
+  it('should restore member_count in SystemDO from AccountDO truth', async () => {
+    // 1. Get an admin user
+    const adminId = env.USER.idFromName('admin');
+    const adminStub = env.USER.get(adminId);
+    const adminIdStr = adminId.toString();
+
+    const { sessionId } = await adminStub.createSession();
+    const cookieHeader = `session_id=${await cookieManager.encrypt(`${sessionId}:${adminIdStr}`)}`;
+
+    // 2. Create an account
+    const createRes = await SELF.fetch('http://example.com/users/admin/api/accounts', {
+      method: 'POST',
+      headers: {
+        Cookie: cookieHeader,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ name: 'Sync Test Account' }),
+    });
+    const { id: accountId } = (await createRes.json()) as any;
+
+    // 3. Manually break the count in SystemDO (set it to 100)
+    const systemStub = env.SYSTEM.get(env.SYSTEM.idFromName('global'));
+    await systemStub.updateMemberCount(accountId, 100);
+
+    // Verify it is broken
+    let listRes = await SELF.fetch('http://example.com/users/admin/api/accounts', {
+      headers: { Cookie: cookieHeader },
+    });
+    let accounts = (await listRes.json()) as any[];
+    let account = accounts.find((a) => a.id === accountId);
+    expect(account.member_count).toBe(100);
+
+    // 4. Add a member via API, which should trigger syncMemberCount()
+    const userId = env.USER.newUniqueId().toString();
+    await SELF.fetch(`http://example.com/users/admin/api/accounts/${accountId}/members`, {
+      method: 'POST',
+      headers: {
+        Cookie: cookieHeader,
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ user_id: userId, role: 0 }),
+    });
+
+    // 5. Verify count is restored to 1 (actual number of members in AccountDO)
+    listRes = await SELF.fetch('http://example.com/users/admin/api/accounts', {
+      headers: { Cookie: cookieHeader },
+    });
+    accounts = (await listRes.json()) as any[];
+    account = accounts.find((a) => a.id === accountId);
+    expect(account.member_count).toBe(1);
+  });
+
   it('should delete an account via admin API', async () => {
     // 1. Get an admin user
     const adminId = env.USER.idFromName('admin');