diff --git a/package/libfuse/Config.in b/package/libfuse/Config.in
index 2e9b7dc9a..5d308927f 100644
--- a/package/libfuse/Config.in
+++ b/package/libfuse/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_LIBFUSE
 	bool "libfuse"
 	depends on BR2_LARGEFILE
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	help
 	  FUSE (Filesystem in UserSpacE)
 
diff --git a/package/sshfs/Config.in b/package/sshfs/Config.in
index d0cf932bb..11b6bb902 100644
--- a/package/sshfs/Config.in
+++ b/package/sshfs/Config.in
@@ -8,6 +8,7 @@ config BR2_PACKAGE_SSHFS
 	depends on BR2_LARGEFILE
 	depends on BR2_USE_WCHAR # glib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libfuse
+	depends on BR2_USE_MMU # libfuse
 	help
 	  FUSE filesystem client based on the SSH File Transfer Protocol.
 
diff --git a/package/unionfs/Config.in b/package/unionfs/Config.in
index 92f178754..2ac7be9c2 100644
--- a/package/unionfs/Config.in
+++ b/package/unionfs/Config.in
@@ -3,6 +3,7 @@ config BR2_PACKAGE_UNIONFS
 	select BR2_PACKAGE_LIBFUSE
 	depends on BR2_LARGEFILE
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libfuse
+	depends on BR2_USE_MMU # libfuse
 	help
 	  A userspace unionfs implementation.