diff --git a/extensions/clientprefs/cookie.cpp b/extensions/clientprefs/cookie.cpp
index 01f90368..53ff2fdc 100644
--- a/extensions/clientprefs/cookie.cpp
+++ b/extensions/clientprefs/cookie.cpp
@@ -396,7 +396,7 @@ void CookieManager::OnPluginDestroyed(IPlugin *plugin)
 				{
 					ItemDrawInfo draw;
 					const char *info = clientMenu->GetItemInfo(i, &draw);
-					AutoMenuData *data = (AutoMenuData *)strtol(info, NULL, 16);
+					AutoMenuData *data = (AutoMenuData *)strtoul(info, NULL, 16);
 
 					if (data->handler->forward != NULL)
 					{
diff --git a/extensions/clientprefs/menus.cpp b/extensions/clientprefs/menus.cpp
index ca2e8401..3c9b6714 100644
--- a/extensions/clientprefs/menus.cpp
+++ b/extensions/clientprefs/menus.cpp
@@ -40,7 +40,7 @@ void ClientMenuHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int i
 
 	const char *info = menu->GetItemInfo(item, &draw);
 
-	AutoMenuData *data = (AutoMenuData *)strtol(info, NULL, 16);
+	AutoMenuData *data = (AutoMenuData *)strtoul(info, NULL, 16);
 
 	if (data->handler->forward != NULL)
 	{
@@ -94,7 +94,7 @@ unsigned int ClientMenuHandler::OnMenuDisplayItem(IBaseMenu *menu,
 
 	const char *info = menu->GetItemInfo(item, &draw);
 
-	AutoMenuData *data = (AutoMenuData *)strtol(info, NULL, 16);
+	AutoMenuData *data = (AutoMenuData *)strtoul(info, NULL, 16);
 
 	if (data->handler->forward != NULL)
 	{
@@ -122,7 +122,7 @@ void AutoMenuHandler::OnMenuSelect(SourceMod::IBaseMenu *menu, int client, unsig
 
 	const char *info = menu->GetItemInfo(item, &draw);
 
-	AutoMenuData *data = (AutoMenuData *)strtol(info, NULL, 16);
+	AutoMenuData *data = (AutoMenuData *)strtoul(info, NULL, 16);
 
 	switch (data->type)
 	{