diff -u b/core/modules/migrate/src/Plugin/migrate/process/Explode.php b/core/modules/migrate/src/Plugin/migrate/process/Explode.php
--- b/core/modules/migrate/src/Plugin/migrate/process/Explode.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/Explode.php
@@ -34,7 +34,7 @@
  * @endcode
  *
  * If foo is "node/1", then bar will be ['node', '1']. The PHP equivalent of
- * this would be: $bar = explode('/', $foo)
+ * this would be: $bar = explode('/', $foo).
  *
  * @code
  * process:
@@ -46,7 +46,7 @@
  * @endcode
  *
  * If foo is "node/1/edit", then bar will be ['node', '1/edit']. The PHP
- * equivalent of this would be: $bar = explode('/', $foo)
+ * equivalent of this would be: $bar = explode('/', $foo, 1).
  *
  * @see \Drupal\migrate\Plugin\MigrateProcessInterface
  *