diff --git a/tests/functional/syntax/test_interfaces.py b/tests/functional/syntax/test_interfaces.py
index baf0c73c30..007ee61c93 100644
--- a/tests/functional/syntax/test_interfaces.py
+++ b/tests/functional/syntax/test_interfaces.py
@@ -600,7 +600,6 @@ def bar():
         compiler.compile_code(main, input_bundle=input_bundle)
 
 
-@pytest.mark.xfail
 def test_intrinsic_interfaces_default_function(make_input_bundle, get_contract):
     lib1 = """
 @external
@@ -618,6 +617,26 @@ def bar():
     """
     input_bundle = make_input_bundle({"lib1.vy": lib1})
 
-    # TODO make the exception more precise once fixed
-    with pytest.raises(Exception):  # noqa: B017
+    with pytest.raises(ValueError):
+        compiler.compile_code(main, input_bundle=input_bundle)
+
+
+def test_intrinsic_interfaces_default_function_staticcall(make_input_bundle, get_contract):
+    lib1 = """
+@external
+@view
+def __default__() -> int128:
+    return 43
+    """
+    main = """
+import lib1
+
+@external
+def bar():
+    foo:int128 = 0
+    foo = staticcall lib1.__at__(self).__default__()
+    """
+    input_bundle = make_input_bundle({"lib1.vy": lib1})
+
+    with pytest.raises(ValueError):
         compiler.compile_code(main, input_bundle=input_bundle)
diff --git a/vyper/ast/nodes.py b/vyper/ast/nodes.py
index ccc80947e4..f835e8fd53 100644
--- a/vyper/ast/nodes.py
+++ b/vyper/ast/nodes.py
@@ -1304,6 +1304,8 @@ def validate(self):
                 self.value,
                 hint="did you forget parentheses?",
             )
+        if hasattr(self.value.func, "attr") and self.value.func.attr == "__default__":
+            raise ValueError("function __default__ cannot be called")
 
 
 class StaticCall(ExprNode):
@@ -1316,6 +1318,8 @@ def validate(self):
                 self.value,
                 hint="did you forget parentheses?",
             )
+        if hasattr(self.value.func, "attr") and self.value.func.attr == "__default__":
+            raise ValueError("function __default__ cannot be called")
 
 
 class keyword(VyperNode):