diff --git a/package/libssh/Config.in b/package/libssh/Config.in
index 080ad18e70..719ca8ca3f 100644
--- a/package/libssh/Config.in
+++ b/package/libssh/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LIBSSH
         bool "libssh"
+        depends on BR2_USE_MMU # fork()
         # Either OpenSSL or libgcrypt are mandatory
         select BR2_PACKAGE_LIBGCRYPT if !BR2_PACKAGE_OPENSSL
         help