diff --git a/package/rpm/Config.in b/package/rpm/Config.in
index de06141cea..2492616580 100644
--- a/package/rpm/Config.in
+++ b/package/rpm/Config.in
@@ -1,9 +1,11 @@
 comment "rpm needs a toolchain w/ threads"
 	depends on !BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 
 config BR2_PACKAGE_RPM
 	bool "rpm"
 	depends on BR2_TOOLCHAIN_HAS_THREADS # beecrypt
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_BEECRYPT
 	select BR2_PACKAGE_POPT
 	select BR2_PACKAGE_OPENSSL