diff --git a/moo.mprj b/moo.mprj
index e5af3ef5..d7b15183 100644
--- a/moo.mprj
+++ b/moo.mprj
@@ -2,6 +2,9 @@
 <medit-project version="1.0" type="C" name="moo">
  <active>debug</active>
  <configurations>
+  <darwin>
+   <build_dir>build/darwin</build_dir>
+  </darwin>
   <debug>
    <build_dir>build/debug</build_dir>
    <configure>
diff --git a/moo/mooutils/moocobject.m b/moo/mooutils/moocobject.m
index 873c8273..e682c495 100644
--- a/moo/mooutils/moocobject.m
+++ b/moo/mooutils/moocobject.m
@@ -11,8 +11,14 @@
  *   See COPYING file that comes with this distribution.
  */
 
+#include <config.h>
 #import "moocobject.h"
 
+#ifdef MOO_OS_DARWIN
+#define class_get_class_name(klass) (klass->name)
+#define sel_get_name sel_getName
+#endif
+
 #define OBJECT_HAS_TOGGLE_REF_FLAG 1
 #define OBJECT_HAS_TOGGLE_REF() ((g_datalist_get_flags (&moo_c_object_qdata) & OBJECT_HAS_TOGGLE_REF_FLAG) != 0)
 
@@ -44,6 +50,7 @@ toggle_refs_notify (MooCObject *object,
     return self;
 }
 
+#ifndef MOO_OS_DARWIN
 - (retval_t) forward :(SEL)aSel :(arglist_t)argFrame
 {
     MOO_UNUSED_VAR (argFrame);
@@ -51,6 +58,15 @@ toggle_refs_notify (MooCObject *object,
                 sel_get_name (aSel), [self name], (gpointer) self);
     return NULL;
 }
+#else
+- forward: (SEL)aSel :(marg_list)args
+{
+    MOO_UNUSED_VAR (args);
+    g_critical ("no method `%s' found in <%s at %p>",
+                sel_get_name (aSel), [self name], (gpointer) self);
+    return nil;
+}
+#endif
 
 - init
 {