diff --git a/passerelle_montpellier_sig/views.py b/passerelle_montpellier_sig/views.py
index 3b0615e..781fb2f 100644
--- a/passerelle_montpellier_sig/views.py
+++ b/passerelle_montpellier_sig/views.py
@@ -52,6 +52,8 @@ prefix_map = {
 }
 
 def prefix_cleanup(name):
+    if not name:
+        return ''
     name = name.strip()
     for prefix, full in prefix_map.items():
         if name.startswith(prefix + ' '):
@@ -59,6 +61,8 @@ def prefix_cleanup(name):
     return name
 
 def get_original_prefix(name):
+    if not name:
+        return ''
     name = name.strip()
     for prefix, full in prefix_map.items():
         if name.startswith(full + ' '):
@@ -66,6 +70,8 @@ def get_original_prefix(name):
     return name.upper()
 
 def split_street(name):
+    if not name:
+        return '', ''
     name = name.strip()
     for prefix, full in prefix_map.items():
         prefix += ' '