diff --git a/Spanner/src/SpannerClient.php b/Spanner/src/SpannerClient.php
index e0952fe8df6..e29fad887b2 100644
--- a/Spanner/src/SpannerClient.php
+++ b/Spanner/src/SpannerClient.php
@@ -794,7 +794,7 @@ public function pgJsonb($value)
      */
     public function pgOid($value)
     {
-        return new pgOid($value);
+        return new PgOid($value);
     }
 
     /**