diff --git a/orangecontrib/spectroscopy/preprocess/__init__.py b/orangecontrib/spectroscopy/preprocess/__init__.py
index bbc5014d8..5895e261b 100644
--- a/orangecontrib/spectroscopy/preprocess/__init__.py
+++ b/orangecontrib/spectroscopy/preprocess/__init__.py
@@ -440,7 +440,7 @@ def __call__(self, data):
             return np.ones((len(data), len(self.points))) * np.nan
         interpfn = self.interpfn
         if interpfn is None:
-            if self.handle_nans and bottleneck.anynan(ys):
+            if self.handle_nans and np.any(np.isnan(ys)):
                 if self.kind == "linear":
                     interpfn = interp1d_with_unknowns_numpy
                 else: