diff --git a/google/cloud/asset/v1/asset_service.proto b/google/cloud/asset/v1/asset_service.proto
index ee8c4129..d7d22fee 100644
--- a/google/cloud/asset/v1/asset_service.proto
+++ b/google/cloud/asset/v1/asset_service.proto
@@ -425,7 +425,7 @@ message BigQueryDestination {
   // [partition_spec] determines whether to export to partitioned table(s) and
   // how to partition the data.
   //
-  // If [partition_spec] is unset or [partition_spec.partion_key] is unset or
+  // If [partition_spec] is unset or [partition_spec.partition_key] is unset or
   // `PARTITION_KEY_UNSPECIFIED`, the snapshot results will be exported to
   // non-partitioned table(s). [force] will decide whether to overwrite existing
   // table(s).