diff --git a/lib/impression/__init__.py b/lib/impression/__init__.py
index 141ab16a..1c528713 100644
--- a/lib/impression/__init__.py
+++ b/lib/impression/__init__.py
@@ -156,6 +156,8 @@ class impression:
     
     def __init__(self, path_to_pdf, adh = None):
         self._fichier = path_to_pdf
+        if not os.path.isfile(path_to_pdf):
+            raise FichierInvalide, "Fichier invalide"
         os.system("/usr/scripts/impression/compatibilise %s" % path_to_pdf)