diff --git a/package/libss7/Config.in b/package/libss7/Config.in
index b99c578182..bdf5fbe3a8 100644
--- a/package/libss7/Config.in
+++ b/package/libss7/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LIBSS7
 	bool "libss7"
+	depends on BR2_USE_MMU # dahdi-tools <- perl
 	depends on BR2_LINUX_KERNEL
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	select BR2_PACKAGE_DAHDI_LINUX