diff --git a/src/connection_string.ts b/src/connection_string.ts
index 2bf1f6dd19..82ff04ce24 100644
--- a/src/connection_string.ts
+++ b/src/connection_string.ts
@@ -1209,6 +1209,7 @@ export const OPTIONS = {
     }
   } as OptionDescriptor,
   wtimeoutMS: {
+    deprecated: 'Please use timeoutMS instead',
     target: 'writeConcern',
     transform({ values: [value], options }) {
       const wc = WriteConcern.fromOptions({
diff --git a/src/utils.ts b/src/utils.ts
index 04174813c9..92596a5d6b 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -556,6 +556,14 @@ export function resolveOptions<T extends CommandOperationOptions>(
   }
 
   result.timeoutMS = options?.timeoutMS ?? parent?.timeoutMS;
+  if (result.timeoutMS != null && result.writeConcern) {
+    const matchOptions = new Set(['wtimeout', 'wtimeoutMS']);
+    console.log(result.writeConcern);
+    const writeConcernKeys = Object.keys(result.writeConcern);
+    if (writeConcernKeys.length <= 2 && writeConcernKeys.every(k => matchOptions.has(k))) {
+      delete result.writeConcern;
+    }
+  }
 
   return result;
 }