diff --git a/classes/ImageManager.php b/classes/ImageManager.php
index c7500c8fd..b29bab40c 100644
--- a/classes/ImageManager.php
+++ b/classes/ImageManager.php
@@ -76,7 +76,7 @@ class ImageManagerCore
 		}
 		// Relative link will always work, whatever the base uri set in the admin
 		if (Context::getContext()->controller->controller_type == 'admin')
-			return '<img src="../img/tmp/'.$cache_image.(!$disable_cache ? '?time='.time() : '').'" alt="" class="imgm" />';
+			return '<img src="..'.DIRECTORY_SEPARATOR.'img'.DIRECTORY_SEPARATOR.'tmp'.DIRECTORY_SEPARATOR.''.$cache_image.(!$disable_cache ? '?time='.time() : '').'" alt="" class="imgm" />';
 		else
 			return '<img src="'._PS_TMP_IMG_.$cache_image.(!$disable_cache ? '?time='.time() : '').'" alt="" class="imgm" />';
 	}
diff --git a/controllers/admin/AdminStoresController.php b/controllers/admin/AdminStoresController.php
index 03a001d34..ec9175901 100644
--- a/controllers/admin/AdminStoresController.php
+++ b/controllers/admin/AdminStoresController.php
@@ -296,8 +296,12 @@ class AdminStoresControllerCore extends AdminController
 
 		if (!($obj = $this->loadObject(true)))
 			return;
+		
+		if (file_exists(_PS_TMP_IMG_DIR_.$this->table.'_'.(int)$obj->id.'.'.$this->imageType)) {
+			@unlink(_PS_TMP_IMG_DIR_.$this->table.'_'.(int)$obj->id.'.'.$this->imageType);
+		}
 
-		$image = ImageManager::thumbnail(_PS_STORE_IMG_DIR_.'/'.$obj->id.'.jpg', $this->table.'_'.(int)$obj->id.'.'.$this->imageType, 350, $this->imageType, true);
+		$image = ImageManager::thumbnail(_PS_STORE_IMG_DIR_.DIRECTORY_SEPARATOR.$obj->id.'.jpg', $this->table.'_'.(int)$obj->id.'.'.$this->imageType, 350, $this->imageType, true, true);
 
 		$days = array();
 		$days[1] = $this->l('Monday');
@@ -316,7 +320,7 @@ class AdminStoresControllerCore extends AdminController
 			'latitude' => $this->getFieldValue($obj, 'latitude') ? $this->getFieldValue($obj, 'latitude') : Configuration::get('PS_STORES_CENTER_LAT'),
 			'longitude' => $this->getFieldValue($obj, 'longitude') ? $this->getFieldValue($obj, 'longitude') : Configuration::get('PS_STORES_CENTER_LONG'),
 			'image' => $image ? $image : false,
-			'size' => $image ? filesize(_PS_STORE_IMG_DIR_.'/'.$obj->id.'.jpg') / 1000 : false,
+			'size' => $image ? filesize(_PS_STORE_IMG_DIR_.DIRECTORY_SEPARATOR.$obj->id.'.jpg') / 1000 : false,
 			'days' => $days,
 			'hours' => isset($hours_unserialized) ? $hours_unserialized : false
 		);