diff --git a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
index 76b474c7c4..cc5f5d7a7b 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
@@ -140,7 +140,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         return $this->configuration['default_value'];
       }
       if (empty($this->configuration['bypass'])) {
-        throw new MigrateSkipRowException('Skipping, no mapped value found.');
+        throw new MigrateSkipRowException(sprintf('Skipping, no mapping found for value: %s.', print_r($value, TRUE)));
       }
       else {
         return $value;