diff --git a/sandpyper/common.py b/sandpyper/common.py
index b4c004b..20cf0cc 100644
--- a/sandpyper/common.py
+++ b/sandpyper/common.py
@@ -1274,7 +1274,7 @@ def extract_from_folder(
     if mode == "dsm":
         nan_out = np.count_nonzero(np.isnan(np.array(gdf.z).astype("f")))
         nan_raster = np.count_nonzero(gdf.z == nan_values)
-        gdf.z.replace(-10000, np.nan, inplace=True)
+        gdf.z.replace(nan_values, np.nan, inplace=True)
 
     elif mode == "ortho":
         nan_out = np.count_nonzero(