diff --git a/gestion/annuaires_pg.py b/gestion/annuaires_pg.py
index 8dfc100c..66d76ce8 100755
--- a/gestion/annuaires_pg.py
+++ b/gestion/annuaires_pg.py
@@ -58,12 +58,16 @@ def reverse(batiment, prise = None):
     
 def is_crans(batiment, chambre):
     """Chambre cablee au Cr@ns ?"""
+    batiment = batiment.lower()
+    chambre = chambre.lower()
     cur = conn.cursor()
     cur.execute("SELECT crans FROM prises WHERE (batiment, chambre) = (%s, %s)", (batiment, chambre))
     return cur.fetchone()[0]
 
 def crous_to_crans(batiment, chambre):
     """Passage d'une chambre de CROUS a Cr@ns"""
+    batiment = batiment.lower()
+    chambre = chambre.lower()
     if is_crans(batiment, chambre):
         return
     cur = conn.cursor()