diff --git a/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java b/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java
index cccfced08218..7e5c734a2e26 100644
--- a/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java
+++ b/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/spanner/SpannerIO.java
@@ -311,7 +311,7 @@
  *
  * <p>Note that the <a
  * href="https://cloud.google.com/spanner/quotas#limits_for_creating_reading_updating_and_deleting_data">maximum
- * size of a single transaction</a> is 20,000 mutated cells - including cells in indexes. If you
+ * number of mutations in a single transaction</a> is 80,000 mutations - including mutations in indexes. If you
  * have a large number of indexes and are getting exceptions with message: <tt>INVALID_ARGUMENT: The
  * transaction contains too many mutations</tt> you will need to specify a smaller number of {@code
  * MaxNumMutations}.