diff --git a/package/strongswan/Config.in b/package/strongswan/Config.in
index 0daedda81..d2cadf385 100644
--- a/package/strongswan/Config.in
+++ b/package/strongswan/Config.in
@@ -1,4 +1,5 @@
 comment "strongswan needs a toolchain w/ threads"
+	depends on BR2_USE_MMU
 	depends on !BR2_TOOLCHAIN_HAS_THREADS
 
 menuconfig BR2_PACKAGE_STRONGSWAN