diff --git a/package/aespipe/Config.in b/package/aespipe/Config.in
index ccc94c2a0..df99523be 100644
--- a/package/aespipe/Config.in
+++ b/package/aespipe/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_AESPIPE
 	bool "aespipe"
+	depends on BR2_USE_MMU # fork()
 	help
 	  aespipe program is AES encrypting or decrypting pipe. It reads from
 	  standard input and writes to standard output. It can be used to