diff --git a/src/collection.ts b/src/collection.ts
index 3229b0b27e..039d2ecffa 100644
--- a/src/collection.ts
+++ b/src/collection.ts
@@ -288,7 +288,7 @@ export class Collection<TSchema extends Document = Document> {
       options = {};
     }
 
-    // CSFLE passes in { w: 'majority' } to ensure the lib works in both 3.x and 4.x
+    // In use encryption passes in { w: 'majority' } to ensure the lib works in both 3.x and 4.x
     // we support that option style here only
     if (options && Reflect.get(options, 'w')) {
       options.writeConcern = WriteConcern.fromOptions(Reflect.get(options, 'w'));
diff --git a/src/error.ts b/src/error.ts
index d6abfec879..34dd0a1218 100644
--- a/src/error.ts
+++ b/src/error.ts
@@ -111,7 +111,7 @@ export interface ErrorDescription extends Document {
  * @category Error
  *
  * @privateRemarks
- * CSFLE has a dependency on this error, it uses the constructor with a string argument
+ * In use encryption has a dependency on this error, it uses the constructor with a string argument
  */
 export class MongoError extends Error {
   /** @internal */
@@ -568,7 +568,7 @@ export class MongoNetworkError extends MongoError {
  * @category Error
  *
  * @privateRemarks
- * CSFLE has a dependency on this error with an instanceof check
+ * In use encryption has a dependency on this error with an instanceof check
  */
 export class MongoNetworkTimeoutError extends MongoNetworkError {
   constructor(message: string, options?: MongoNetworkErrorOptions) {
diff --git a/src/sdam/topology.ts b/src/sdam/topology.ts
index 48bf9f7bdb..01936cbfa3 100644
--- a/src/sdam/topology.ts
+++ b/src/sdam/topology.ts
@@ -252,7 +252,7 @@ export class Topology extends TypedEventEmitter<TopologyEvents> {
       ) => this.selectServer(selector, options, callback as any)
     );
 
-    // Legacy CSFLE support
+    // Legacy in use encryption support
     this.bson = Object.create(null);
     this.bson.serialize = serialize;
     this.bson.deserialize = deserialize;