diff --git a/package/aiccu/Config.in b/package/aiccu/Config.in
index 15959b1a8c..9cff8ccb23 100644
--- a/package/aiccu/Config.in
+++ b/package/aiccu/Config.in
@@ -3,6 +3,7 @@ config BR2_PACKAGE_AICCU
 	depends on BR2_INET_IPV6
 	depends on BR2_USE_WCHAR
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_GNUTLS
 	help
 	  SixXS Automatic IPv6 Connectivity Client Utility