diff --git a/timm/layers/patch_embed.py b/timm/layers/patch_embed.py
index b7416260..764519f2 100644
--- a/timm/layers/patch_embed.py
+++ b/timm/layers/patch_embed.py
@@ -84,6 +84,14 @@ def resample_patch_embed(
         Resized patch embedding kernel.
     """
     import numpy as np
+    try:
+        import functorch
+        vmap = functorch.vmap
+    except ImportError:
+        if hasattr(torch, 'vmap'):
+            vmap = torch.vmap
+        else:
+            assert False, "functorch or a version of torch with vmap is required for FlexiViT resizing."
 
     assert len(patch_embed.shape) == 4, "Four dimensions expected"
     assert len(new_size) == 2, "New shape should only be hw"
@@ -115,7 +123,7 @@ def resample_patch_embed(
         resampled_kernel = resize_mat_pinv @ kernel.reshape(-1)
         return resampled_kernel.reshape(new_size)
 
-    v_resample_kernel = torch.vmap(torch.vmap(resample_kernel, 0, 0), 1, 1)
+    v_resample_kernel = vmap(vmap(resample_kernel, 0, 0), 1, 1)
     return v_resample_kernel(patch_embed)
 
 
diff --git a/timm/version.py b/timm/version.py
index c9cc324d..d1a9131b 100644
--- a/timm/version.py
+++ b/timm/version.py
@@ -1 +1 @@
-__version__ = '0.8.2dev0'
+__version__ = '0.8.3dev0'