diff --git a/impression/impression_canon.py b/impression/impression_canon.py
index 15877967..8c17bfc6 100644
--- a/impression/impression_canon.py
+++ b/impression/impression_canon.py
@@ -390,6 +390,7 @@ class impression:
             if len(adh) > 1:
                 adh = adh[1:]
             adh = self._get_adh(adh[0])
+            self._calcule_prix() # Normalement inutile, mais évite les races
             if (self._prix > (adh.solde() - DECOUVERT_AUTHORISE)):
                 raise SoldeInsuffisant
             adh.solde(-self._prix, "impression(%d): %s par %s" % (self._jid,self._fichier,self._adh))