diff --git a/PyMca5/PyMcaGui/pymca/QStackWidget.py b/PyMca5/PyMcaGui/pymca/QStackWidget.py
index c474ac47e..a8a896c12 100644
--- a/PyMca5/PyMcaGui/pymca/QStackWidget.py
+++ b/PyMca5/PyMcaGui/pymca/QStackWidget.py
@@ -39,6 +39,12 @@
     QString = qt.QString
 else:
     QString = qt.safe_str
+try:
+    # try to import silx prior to importing matplotlib
+    # to prevent unnecessary warning
+    import silx.gui.plot
+except:
+    pass
 
 from PyMca5.PyMcaGui import PyMcaFileDialogs
 from PyMca5.PyMcaCore import DataObject