diff --git a/pyroute2/netns/__init__.py b/pyroute2/netns/__init__.py
index a29201a20..e211de3e1 100644
--- a/pyroute2/netns/__init__.py
+++ b/pyroute2/netns/__init__.py
@@ -109,6 +109,7 @@
     'ppc6': {'64bit': 350},
     's390': {'64bit': 339},
     'loongarch64': {'64bit': 268},
+    'risc': {'64bit': 268},
 }
 __NR_setns = __NR.get(config.machine[:4], {}).get(config.arch, 308)