diff --git a/package/zsh/Config.in b/package/zsh/Config.in
index fd63aa9190..6853249b98 100644
--- a/package/zsh/Config.in
+++ b/package/zsh/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_ZSH
 	bool "zsh"
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_NCURSES
 	help
 	  zsh is a shell designed for interactive use, although it is also