diff --git a/google-cloud-clients/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SessionPoolOptions.java b/google-cloud-clients/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SessionPoolOptions.java
index 6cc82cb40c9b..0ae3b8aa7b03 100644
--- a/google-cloud-clients/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SessionPoolOptions.java
+++ b/google-cloud-clients/google-cloud-spanner/src/main/java/com/google/cloud/spanner/SessionPoolOptions.java
@@ -98,7 +98,7 @@ public Builder setMinSessions(int minSessions) {
      * Maximum number of sessions that this pool will have. If current numbers of sessions in the
      * pool is less than this and they are all busy, then a new session will be created for any new
      * operation. If current number of in use sessions is same as this and a new request comes, pool
-     * can either block or fail. Defaults to 2000.
+     * can either block or fail. Defaults to 400.
      */
     public Builder setMaxSessions(int maxSessions) {
       this.maxSessions = maxSessions;