diff --git a/impls/rpython/step8_macros.py b/impls/rpython/step8_macros.py
index eaecd35ec9..ffc22afadf 100644
--- a/impls/rpython/step8_macros.py
+++ b/impls/rpython/step8_macros.py
@@ -93,8 +93,10 @@ def EVAL(ast, env):
             ast = quasiquote(ast[1]) # Continue loop (TCO)
         elif u"defmacro!" == a0sym:
             func = EVAL(ast[2], env)
-            func.ismacro = True
-            return env.set(ast[1], func)
+            return env.set(ast[1],
+                           MalFunc(func.fn, ast=func.ast, env=func.env,
+                           params=func.params, EvalFunc=func.EvalFunc,
+                           ismacro=True))
         elif u"do" == a0sym:
             if len(ast) == 0:
                 return nil
diff --git a/impls/rpython/step9_try.py b/impls/rpython/step9_try.py
index f98074dfbb..f322655542 100644
--- a/impls/rpython/step9_try.py
+++ b/impls/rpython/step9_try.py
@@ -93,8 +93,10 @@ def EVAL(ast, env):
             ast = quasiquote(ast[1]) # Continue loop (TCO)
         elif u"defmacro!" == a0sym:
             func = EVAL(ast[2], env)
-            func.ismacro = True
-            return env.set(ast[1], func)
+            return env.set(ast[1],
+                           MalFunc(func.fn, ast=func.ast, env=func.env,
+                           params=func.params, EvalFunc=func.EvalFunc,
+                           ismacro=True))
         elif u"try*" == a0sym:
             if len(ast) < 3:
                 return EVAL(ast[1], env);
diff --git a/impls/rpython/stepA_mal.py b/impls/rpython/stepA_mal.py
index 624a9b0e7b..088f6b74eb 100644
--- a/impls/rpython/stepA_mal.py
+++ b/impls/rpython/stepA_mal.py
@@ -102,8 +102,10 @@ def EVAL(ast, env):
             ast = quasiquote(ast[1]) # Continue loop (TCO)
         elif u"defmacro!" == a0sym:
             func = EVAL(ast[2], env)
-            func.ismacro = True
-            return env.set(ast[1], func)
+            return env.set(ast[1],
+                           MalFunc(func.fn, ast=func.ast, env=func.env,
+                           params=func.params, EvalFunc=func.EvalFunc,
+                           ismacro=True))
         elif u"try*" == a0sym:
             if len(ast) < 3:
                 return EVAL(ast[1], env);