diff --git a/package/mtools/Config.in b/package/mtools/Config.in
index 58652232e5..e51bac121c 100644
--- a/package/mtools/Config.in
+++ b/package/mtools/Config.in
@@ -12,3 +12,4 @@ config BR2_PACKAGE_MTOOLS
 
 comment "mtools needs a toolchain w/ wchar"
 	depends on !BR2_USE_WCHAR
+	depends on BR2_USE_MMU