diff --git a/impls/d/step8_macros.d b/impls/d/step8_macros.d
index 7671d6f8..a186e795 100644
--- a/impls/d/step8_macros.d
+++ b/impls/d/step8_macros.d
@@ -165,6 +165,7 @@ MalType EVAL(MalType ast, Env env)
             case "defmacro!":
                 auto a1 = verify_cast!MalSymbol(aste[1]);
                 auto mac = verify_cast!MalFunc(EVAL(aste[2], env));
+                mac = new MalFunc(mac.arg_names, mac.func_body, mac.def_env);
                 mac.is_macro = true;
                 return env.set(a1, mac);
 
diff --git a/impls/d/step9_try.d b/impls/d/step9_try.d
index cd44bf27..77da44b4 100644
--- a/impls/d/step9_try.d
+++ b/impls/d/step9_try.d
@@ -165,6 +165,7 @@ MalType EVAL(MalType ast, Env env)
             case "defmacro!":
                 auto a1 = verify_cast!MalSymbol(aste[1]);
                 auto mac = verify_cast!MalFunc(EVAL(aste[2], env));
+                mac = new MalFunc(mac.arg_names, mac.func_body, mac.def_env);
                 mac.is_macro = true;
                 return env.set(a1, mac);
 
diff --git a/impls/d/stepA_mal.d b/impls/d/stepA_mal.d
index 9fdd0f5d..1b6e4908 100644
--- a/impls/d/stepA_mal.d
+++ b/impls/d/stepA_mal.d
@@ -166,6 +166,7 @@ MalType EVAL(MalType ast, Env env)
             case "defmacro!":
                 auto a1 = verify_cast!MalSymbol(aste[1]);
                 auto mac = verify_cast!MalFunc(EVAL(aste[2], env));
+                mac = new MalFunc(mac.arg_names, mac.func_body, mac.def_env);
                 mac.is_macro = true;
                 return env.set(a1, mac);