diff --git a/app/Controllers/Customers.php b/app/Controllers/Customers.php
index 2bd62add1..dea0b1201 100644
--- a/app/Controllers/Customers.php
+++ b/app/Controllers/Customers.php
@@ -90,7 +90,7 @@ class Customers extends Persons
 		$search = $this->request->getGet('search');
 		$limit = $this->request->getGet('limit', FILTER_SANITIZE_NUMBER_INT);
 		$offset = $this->request->getGet('offset', FILTER_SANITIZE_NUMBER_INT);
-		$sort = $this->sanitizeSortColumn(CUSTOMER_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'person_id');
+		$sort = $this->sanitizeSortColumn(CUSTOMER_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'people.person_id');
 		$order = $this->request->getGet('order', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
 		$customers = $this->customer->search($search, $limit, $offset, $sort, $order);
diff --git a/app/Controllers/Employees.php b/app/Controllers/Employees.php
index b3de87dd7..cd669022d 100644
--- a/app/Controllers/Employees.php
+++ b/app/Controllers/Employees.php
@@ -30,7 +30,7 @@ class Employees extends Persons
 		$search = $this->request->getGet('search');
 		$limit  = $this->request->getGet('limit', FILTER_SANITIZE_NUMBER_INT);
 		$offset = $this->request->getGet('offset', FILTER_SANITIZE_NUMBER_INT);
-		$sort   = $this->sanitizeSortColumn(PERSON_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'person_id');
+		$sort   = $this->sanitizeSortColumn(PERSON_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'people.person_id');
 		$order  = $this->request->getGet('order', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
 		$employees = $this->employee->search($search, $limit, $offset, $sort, $order);
diff --git a/app/Controllers/Suppliers.php b/app/Controllers/Suppliers.php
index caee78081..14f47954e 100644
--- a/app/Controllers/Suppliers.php
+++ b/app/Controllers/Suppliers.php
@@ -48,7 +48,7 @@ class Suppliers extends Persons
 		$search = $this->request->getGet('search');
 		$limit = $this->request->getGet('limit', FILTER_SANITIZE_NUMBER_INT);
 		$offset = $this->request->getGet('offset', FILTER_SANITIZE_NUMBER_INT);
-		$sort = $this->sanitizeSortColumn(SUPPLIER_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'person_id');
+		$sort = $this->sanitizeSortColumn(SUPPLIER_HEADERS, $this->request->getGet('sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS), 'people.person_id');
 		$order = $this->request->getGet('order', FILTER_SANITIZE_FULL_SPECIAL_CHARS);
 
 		$suppliers = $this->supplier->search($search, $limit, $offset, $sort, $order);