diff --git a/src/cmap/connect.ts b/src/cmap/connect.ts
index b2ec3caabf..f15d1096b4 100644
--- a/src/cmap/connect.ts
+++ b/src/cmap/connect.ts
@@ -249,6 +249,7 @@ export async function prepareHandshakeDocument(
 
 /** @public */
 export const LEGAL_TLS_SOCKET_OPTIONS = [
+  'allowPartialTrustChain',
   'ALPNProtocols',
   'ca',
   'cert',
diff --git a/src/connection_string.ts b/src/connection_string.ts
index 758b3a01de..2bf1f6dd19 100644
--- a/src/connection_string.ts
+++ b/src/connection_string.ts
@@ -1228,7 +1228,8 @@ export const OPTIONS = {
   // Custom types for modifying core behavior
   connectionType: { type: 'any' },
   srvPoller: { type: 'any' },
-  // Accepted NodeJS Options
+  // Accepted Node.js Options
+  allowPartialTrustChain: { type: 'any' },
   minDHSize: { type: 'any' },
   pskCallback: { type: 'any' },
   secureContext: { type: 'any' },
diff --git a/src/mongo_client.ts b/src/mongo_client.ts
index db16e556c1..e8aae51639 100644
--- a/src/mongo_client.ts
+++ b/src/mongo_client.ts
@@ -93,8 +93,10 @@ export interface PkFactory {
 
 /** @public */
 export type SupportedTLSConnectionOptions = Pick<
-  TLSConnectionOptions,
-  Extract<keyof TLSConnectionOptions, (typeof LEGAL_TLS_SOCKET_OPTIONS)[number]>
+  TLSConnectionOptions & {
+    allowPartialTrustChain?: boolean;
+  },
+  (typeof LEGAL_TLS_SOCKET_OPTIONS)[number]
 >;
 
 /** @public */