diff --git a/package/wsapi/Config.in b/package/wsapi/Config.in
index 3621648484..472bbfcee1 100644
--- a/package/wsapi/Config.in
+++ b/package/wsapi/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_WSAPI
 	bool "wsapi"
+	depends on BR2_LARGEFILE # luafilesystem
 	select BR2_PACKAGE_COXPCALL
 	select BR2_PACKAGE_LUAFILESYSTEM
 	select BR2_PACKAGE_RINGS
@@ -7,3 +8,6 @@ config BR2_PACKAGE_WSAPI
 	  API that abstracts the web server from Lua web applications.
 
 	  http://keplerproject.github.com/wsapi/
+
+comment "wsapi requires a toolchain with LARGEFILE support"
+	depends on !BR2_LARGEFILE