diff --git a/codegen.py b/codegen.py
index 3a039c0..a343081 100644
--- a/codegen.py
+++ b/codegen.py
@@ -420,7 +420,10 @@ def write_comma():
             self.visit(arg)
         for keyword in node.keywords:
             write_comma()
-            self.write(keyword.arg + '=')
+            if keyword.arg is not None:
+              self.write(keyword.arg + '=')
+            else:
+              self.write('**')
             self.visit(keyword.value)
         if node.starargs is not None:
             write_comma()
diff --git a/test.py b/test.py
index 1531e09..1572ee2 100644
--- a/test.py
+++ b/test.py
@@ -65,6 +65,10 @@ def test_import(self):
         self.assertPreserved("import intertools as iterators")
         self.assertPreserved("from math import floor as fl, ceil as cl")
 
-
+    def test_function_call(self):
+        self.assertPreserved("f(x, 5, x=7)")
+        self.assertPreserved("f(x, **{'x': 7})")
+        self.assertPreserved("f(x, *['x'])")
+        
 if __name__ == '__main__':
   unittest.main()