diff --git a/orangecontrib/spectroscopy/widgets/owpls.py b/orangecontrib/spectroscopy/widgets/owpls.py
index b1d44e61f..e1230bf35 100644
--- a/orangecontrib/spectroscopy/widgets/owpls.py
+++ b/orangecontrib/spectroscopy/widgets/owpls.py
@@ -27,11 +27,14 @@ class Outputs(OWBaseLearner.Outputs):
 
     class Warning(OWBaseLearner.Warning):
         sparse_data = Msg('Sparse input data: default preprocessing is to scale it.')
+        deprecated = Msg('The PLS widget is deprecated and will be removed in the future.\n'
+                         'You can use a PLS widget in the core Orange instead.')
 
     n_components = Setting(2)
     max_iter = Setting(500)
 
     def add_main_layout(self):
+        self.Warning.deprecated()
 
         self.optimization_box = gui.vBox(
             self.controlArea, "Optimization Parameters")