diff --git a/pimgen.py b/pimgen.py
index 0b6cb6b..9c177c1 100755
--- a/pimgen.py
+++ b/pimgen.py
@@ -86,6 +86,16 @@
 
         return m
 
+    def call(self, loader, indent):
+        return self.render(
+            loader,
+            'method.mako.cpp',
+            method=self,
+            indent=indent)
+
+    def argument(self, loader, indent):
+        return self.call(loader, indent)
+
 
 class Filter(MethodCall):
     '''Provide common attributes for any filter.'''
@@ -111,6 +121,13 @@
         kw.clear()
         super(DbusSignature, self).__init__(**kw)
 
+    def argument(self, loader, indent):
+        return self.render(
+            loader,
+            'signature.mako.cpp',
+            signature=self,
+            indent=indent)
+
 
 class DestroyObject(Action):
     '''Render a destroyObject action.'''