diff --git a/ldm/data/imagenet.py b/ldm/data/imagenet.py
index 1c473f9c6..64d6db290 100644
--- a/ldm/data/imagenet.py
+++ b/ldm/data/imagenet.py
@@ -97,7 +97,7 @@ def _load(self):
             self.relpaths = self._filter_relpaths(self.relpaths)
             print("Removed {} files from filelist during filtering.".format(l1 - len(self.relpaths)))
 
-        self.synsets = [p.split("/")[0] for p in self.relpaths]
+        self.synsets = [p.split(os.sep)[0] for p in self.relpaths]
         self.abspaths = [os.path.join(self.datadir, p) for p in self.relpaths]
 
         unique_synsets = np.unique(self.synsets)