1 files changed, 4 insertions, 1 deletions
diff --git a/neb/std/core.py b/neb/std/core.py
index 8d58bd7..9b660bc 100644
--- a/neb/std/core.py
+++ b/neb/std/core.py
@@ -169,7 +169,10 @@ def interpretFunc(symbol, args, env, ns):
     func.name = name
 
     if env.contains(name) and isinstance(env.get(name), MultiFunction):
-        env.register(name, env.get(name).register(func))
+        # TODO this doesn't check for ambiguity/overwrites!!!
+        mf = env.get(name)
+        mf.register(func)
+        env.register(name, mf)
     else:
         mf = MultiFunction("name")
         mf.register(func)