diff --git a/Changelog b/Changelog
index aa75b5d78..61e0fa38a 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@
 
 	* include/form_input.php:
 	Solved OD jrn problem: variable e_accountX were empty after form save, and before form submit.
+	Prevented operations with 0 debit/credit. 
 
 2005-07-04  sparkyx  <sparkyx@eleven>
 
diff --git a/include/form_input.php b/include/form_input.php
index efd127f54..c4437130e 100644
--- a/include/form_input.php
+++ b/include/form_input.php
@@ -1472,8 +1472,8 @@ function FormODS($p_cn,$p_jrn,$p_user,$p_submit,$p_array=null,$view_only=true,$p
       return null;
     else 
       $e_date=substr($l_date_start,2,8);
-  }
-
+  }    
+  
   $e_ech=(isset($e_ech))?$e_ech:"";
   $e_comment=(isset($e_comment))?$e_comment:"";
   // Save old value and set a new one
@@ -1600,6 +1600,15 @@ function FormODS($p_cn,$p_jrn,$p_user,$p_submit,$p_array=null,$view_only=true,$p
     echo "<script> alert('$msg'); </script>";
     return null;
   }
+
+  // Verify that we have a non-null operation
+  if ($view_only==true and $sum_cred == 0)
+  {
+    $msg=sprintf("Montant null");
+    echo "<script> alert('$msg'); </script>";
+    return null;
+  }
+  
   return $r;