diff --git a/bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/Movement_getCreditPrice.xml b/bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/Movement_getCreditPrice.xml
index ba542dd60a664ace40eee06632ae232996eb79ec..fa257d1695c64f98455959cd956761577490ab3c 100644
--- a/bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/Movement_getCreditPrice.xml
+++ b/bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/Movement_getCreditPrice.xml
@@ -68,7 +68,7 @@
         </item>
         <item>
             <key> <string>_body</string> </key>
-            <value> <string>return -min(brain.total_price, 0)\n
+            <value> <string>return max(-(brain.total_price or 0), 0)\n
 </string> </value>
         </item>
         <item>
@@ -120,7 +120,7 @@
                             <string>brain</string>
                             <string>selection</string>
                             <string>kwd</string>
-                            <string>min</string>
+                            <string>max</string>
                             <string>_getattr_</string>
                           </tuple>
                         </value>
diff --git a/bt5/erp5_accounting/bt/revision b/bt5/erp5_accounting/bt/revision
index 6d3e9dc78d4961c7934c3a850541613398863921..8306ec157b98723c6204c6395c9bce44649681f6 100644
--- a/bt5/erp5_accounting/bt/revision
+++ b/bt5/erp5_accounting/bt/revision
@@ -1 +1 @@
-129
\ No newline at end of file
+130
\ No newline at end of file