diff --git a/fastcore/xtras.py b/fastcore/xtras.py
index 463cd9db..36dea3cd 100644
--- a/fastcore/xtras.py
+++ b/fastcore/xtras.py
@@ -722,8 +722,8 @@ def flexiclass(
 def asdict(o)->dict:
     "Convert `o` to a `dict`, supporting dataclasses, namedtuples, iterables, and `__dict__` attrs."
     if isinstance(o, dict): return o
-    if is_dataclass(o): r = dataclasses.asdict(o)
-    elif hasattr(o, '_asdict'): r = o._asdict()
+    if hasattr(o, '_asdict'): r = o._asdict()
+    elif is_dataclass(o): r = dataclasses.asdict(o)
     elif hasattr(o, '__iter__'):
         try: r = dict(o)
         except TypeError: pass
diff --git a/nbs/03_xtras.ipynb b/nbs/03_xtras.ipynb
index a34af337..f514b0e8 100644
--- a/nbs/03_xtras.ipynb
+++ b/nbs/03_xtras.ipynb
@@ -3032,8 +3032,8 @@
     "def asdict(o)->dict:\n",
     "    \"Convert `o` to a `dict`, supporting dataclasses, namedtuples, iterables, and `__dict__` attrs.\"\n",
     "    if isinstance(o, dict): return o\n",
-    "    if is_dataclass(o): r = dataclasses.asdict(o)\n",
-    "    elif hasattr(o, '_asdict'): r = o._asdict()\n",
+    "    if hasattr(o, '_asdict'): r = o._asdict()\n",
+    "    elif is_dataclass(o): r = dataclasses.asdict(o)\n",
     "    elif hasattr(o, '__iter__'):\n",
     "        try: r = dict(o)\n",
     "        except TypeError: pass\n",