diff --git a/htdocs/core/lib/loan.lib.php b/htdocs/core/lib/loan.lib.php
index b8e4d39c591..a6deb5ad712 100644
--- a/htdocs/core/lib/loan.lib.php
+++ b/htdocs/core/lib/loan.lib.php
@@ -94,7 +94,7 @@ function loan_prepare_head($object)
  * @param   int   	$nbterm  	Total number of term for this loan
  * @return  array				Array with remaining capital, interest, and mensuality for each remaining terms
  */
-function loan_calcmens($mens, $capital, $rate, $echance, $nbterm)
+function loanCalcMonthlyPayment($mens, $capital, $rate, $echance, $nbterm)
 {
     global $conf;
     require_once DOL_DOCUMENT_ROOT.'/loan/class/loanschedule.class.php';
diff --git a/htdocs/loan/calcmens.php b/htdocs/loan/calcmens.php
index 06e2bf93b47..d5f9704addc 100644
--- a/htdocs/loan/calcmens.php
+++ b/htdocs/loan/calcmens.php
@@ -41,6 +41,6 @@ top_httphead();
 
 $output = array();
 
-$output = loan_calcmens($mens, $capital, $rate, $echance, $nbterm);
+$output = loanCalcMonthlyPayment($mens, $capital, $rate, $echance, $nbterm);
 
 echo json_encode($output);
diff --git a/htdocs/loan/payment/payment.php b/htdocs/loan/payment/payment.php
index 2443e44b510..d817cbf3928 100644
--- a/htdocs/loan/payment/payment.php
+++ b/htdocs/loan/payment/payment.php
@@ -190,7 +190,7 @@ if ($action == 'add_payment')
                 // If payment values are modified, recalculate schedule
                 if (($line->amount_capital <> $pay_amount_capital) || ($line->amount_insurance <> $pay_amount_insurance) || ($line->amount_interest <> $pay_amount_interest))
                 {
-                    $arr_term = loan_calcmens(($pay_amount_capital + $pay_amount_interest), $remaindertopay, ($loan->rate / 100), $echance, $loan->nbterm);
+                    $arr_term = loanCalcMonthlyPayment(($pay_amount_capital + $pay_amount_interest), $remaindertopay, ($loan->rate / 100), $echance, $loan->nbterm);
                     foreach ($arr_term as $k=>$v)
                     {
                         // Update fk_bank for current line