diff --git a/sysdeps/managarm/meson.build b/sysdeps/managarm/meson.build
index a662c26e70..c2d8434a84 100644
--- a/sysdeps/managarm/meson.build
+++ b/sysdeps/managarm/meson.build
@@ -70,6 +70,7 @@ elif host_machine.cpu_family() == 'x86_64'
 		'x86_64/thread_entry.S',
 		'x86_64/thread.cpp'
 	)
+elif host_machine.cpu_family() == 'riscv64'
 else
 	error('Unknown architecture')
 endif