diff --git a/system/libs/DataLoader.php b/system/libs/DataLoader.php
index 4ca934e4..66b4ed27 100644
--- a/system/libs/DataLoader.php
+++ b/system/libs/DataLoader.php
@@ -63,7 +63,7 @@ class DataLoader
 
 		self::$startTime = microtime(true);
 
-		require LIBS . 'npc.php';
+		require_once LIBS . 'npc.php';
 		if(NPCs::loadFromXML()) {
 			success(self::$locale['step_database_loaded_npcs'] . self::getLoadedTime());
 		}
diff --git a/system/libs/validator.php b/system/libs/validator.php
index 450c2573..c69f0039 100644
--- a/system/libs/validator.php
+++ b/system/libs/validator.php
@@ -223,7 +223,7 @@ class Validator
 
 		$npcCheck = config('character_name_npc_check');
 		if ($npcCheck) {
-			require LIBS . 'npc.php';
+			require_once LIBS . 'npc.php';
 			NPCS::load();
 			if(NPCS::$npcs && in_array(strtolower($name), NPCS::$npcs)) {
 				self::$lastError = "Invalid name format. Do not use NPC Names";
@@ -346,7 +346,7 @@ class Validator
 
 		$npcCheck = config('character_name_npc_check');
 		if ($npcCheck) {
-			require LIBS . 'npc.php';
+			require_once LIBS . 'npc.php';
 			NPCS::load();
 			if(NPCS::$npcs && in_array($name_lower, NPCS::$npcs)) {
 				self::$lastError = "Invalid name format. Do not use NPC Names";