diff --git a/Controller/SCP_INVOICE_CONTROLLER.cs b/Controller/SCP_INVOICE_CONTROLLER.cs
index 07700b6..afa8453 100644
--- a/Controller/SCP_INVOICE_CONTROLLER.cs
+++ b/Controller/SCP_INVOICE_CONTROLLER.cs
@@ -212,7 +212,7 @@ namespace CK.SCP.Controller
                     }
                     if (!string.IsNullOrEmpty(p_entity.InvcBillNum))
                     {
-                        q = q.Where(p => p.InvcBillNum.Contains(p_entity.InvcBillNum));
+                        q = q.Where(p => p.InvcBillNum==p_entity.InvcBillNum);
                     }
                     if (!string.IsNullOrEmpty(p_entity.VendId))
                     {