diff --git a/include/class/acc_ledger_search.class.php b/include/class/acc_ledger_search.class.php
index 8d0871d2d..bf211a5b3 100644
--- a/include/class/acc_ledger_search.class.php
+++ b/include/class/acc_ledger_search.class.php
@@ -38,7 +38,11 @@ class Acc_Ledger_Search
     private $all; //!< Flag to indicate if all ledgers must be searched (1 for yes)
     private $div; //!< prefix for id of DOM id
     var $id ;    //!< id of the ledger
-    private $inject_col; //< inject code into list_operation to add an extra column 
+    private $inject_col; //< inject_code (string) code into list_operation 
+                        //  to add an extra column  
+                        //  (see Acc_Ledger_Search::list_operation). 
+                        //  All the HTML code must be in inject_code, including the TD tag
+    
     /**
      * @brief return a HTML string with the form for the search
      * @param  $p_type if the type of ledger possible values=ALL,VEN,ACH,ODS,FIN: uppercase !
@@ -792,7 +796,10 @@ class Acc_Ledger_Search
      * \see build_search_sql
      * \see display_search_form
      * \see search_form
-
+     @note  $this->inject_code (string) code into Acc_Ledger_Search::list_operation 
+    //  to add an extra column  
+    //  (see Acc_Ledger_Search::list_operation). 
+    //  All the HTML code must be in inject_code, including the TD tag
      * \return HTML string
      */
     public function list_operation($sql, $offset, $p_paid=0)
@@ -1042,7 +1049,14 @@ class Acc_Ledger_Search
             }
             else
                 $r.="<TD></TD>";
-
+            //< inject_code (string) code into list_operation 
+            //  to add an extra column  
+            //  (see Acc_Ledger_Search::list_operation). 
+            //  All the HTML code must be in inject_code, including the TD tag
+            if ( $this->inject_col != null)
+            {
+                $r.=$this->inject_col;
+            }
             // end row
             $r.="</tr>";
         }