diff --git a/package/lmbench/Config.in b/package/lmbench/Config.in
index c7b656c037..d0a23ad210 100644
--- a/package/lmbench/Config.in
+++ b/package/lmbench/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_LMBENCH
 	bool "lmbench"
 	depends on BR2_TOOLCHAIN_HAS_NATIVE_RPC || BR2_TOOLCHAIN_HAS_THREADS # libtirpc
 	select BR2_PACKAGE_LIBTIRPC if !BR2_TOOLCHAIN_HAS_NATIVE_RPC
+	depends on BR2_USE_MMU # fork()
 	help
 	  LMbench is a suite of simple, portable,
 	  ANSI/C microbenchmarks for UNIX/POSIX.