diff --git a/src/php/ModelGenerator.php b/src/php/ModelGenerator.php
index f87e44d009d9c17e9d2c1e29d3cb2d1264f56dd7..971e7d6e6288c340e84267a2fa9cb6596d3fdd53 100644
--- a/src/php/ModelGenerator.php
+++ b/src/php/ModelGenerator.php
@@ -293,7 +293,7 @@ final class ModelGenerator
                     $repositories[$repo->getName()] = $repo;
                 }
             } catch (Exception $ex) {
-                printf("Erreur pendant le mapping de %s: %s\n", $class, $ex->getMessage());
+                printf("Error while mapping %s: %s\n%s\n", $class, $ex->getMessage(), $ex->getTraceAsString());
             }
         }