diff --git a/htdocs/categories/class/api_categories.class.php b/htdocs/categories/class/api_categories.class.php
index b1d0ff392d6..9f73b1b9e65 100644
--- a/htdocs/categories/class/api_categories.class.php
+++ b/htdocs/categories/class/api_categories.class.php
@@ -278,8 +278,8 @@ class Categories extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 
-		if (!$this->category->delete(DolibarrApiAccess::$user)) {
-			throw new RestException(401, 'error when delete category');
+		if ($this->category->delete(DolibarrApiAccess::$user) <= 0) {
+			throw new RestException(500, 'Error when delete category : ' . $this->category->error);
 		}
 
 		return array(
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index a898d75e52c..ef1415fc17b 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -6127,6 +6127,7 @@ function price($amount, $form = 0, $outlangs = '', $trunc = 1, $rounding = -1, $
 	if (dol_strlen($decpart) > $nbdecimal) {
 		$nbdecimal = dol_strlen($decpart);
 	}
+
 	// If nbdecimal is higher than max to show
 	$nbdecimalmaxshown = (int) str_replace('...', '', getDolGlobalString('MAIN_MAX_DECIMALS_SHOWN'));
 	if ($trunc && $nbdecimal > $nbdecimalmaxshown) {
diff --git a/htdocs/societe/class/api_contacts.class.php b/htdocs/societe/class/api_contacts.class.php
index c0e36e1a250..7e8e8e858d9 100644
--- a/htdocs/societe/class/api_contacts.class.php
+++ b/htdocs/societe/class/api_contacts.class.php
@@ -373,7 +373,7 @@ class Contacts extends DolibarrApi
 	 * Delete contact
 	 *
 	 * @param   int     $id Contact ID
-	 * @return  integer
+	 * @return  array[]
 	 */
 	public function delete($id)
 	{
@@ -389,7 +389,17 @@ class Contacts extends DolibarrApi
 			throw new RestException(401, 'Access not allowed for login '.DolibarrApiAccess::$user->login);
 		}
 		$this->contact->oldcopy = clone $this->contact;
-		return $this->contact->delete(DolibarrApiAccess::$user);
+
+		if ($this->contact->delete(DolibarrApiAccess::$user) <= 0) {
+			throw new RestException(500, 'Error when delete contact ' . $this->contact->error);
+		}
+
+		return array(
+			'success' => array(
+				'code' => 200,
+				'message' => 'Contact deleted'
+			)
+		);
 	}
 
 	/**