diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index d8b89d942c..bc3223eb59 100644
--- a/package/gcc/Config.in.host
+++ b/package/gcc/Config.in.host
@@ -98,6 +98,8 @@ config BR2_TOOLCHAIN_BUILDROOT_FORTRAN
 	# on architecture building libquadmath, wchar is required
 	depends on !BR2_TOOLCHAIN_HAS_LIBQUADMATH || \
 		(BR2_TOOLCHAIN_HAS_LIBQUADMATH && BR2_USE_WCHAR)
+	# requires fork() since gcc 16.x
+	depends on BR2_USE_MMU
 	select BR2_TOOLCHAIN_HAS_FORTRAN
 	help
 	  Enable this option if you want your toolchain to support the