diff --git a/invesalius/reader/dicom_reader.py b/invesalius/reader/dicom_reader.py
index 82d1318..759cf8b 100644
--- a/invesalius/reader/dicom_reader.py
+++ b/invesalius/reader/dicom_reader.py
@@ -177,7 +177,7 @@ class LoadDicom(threading.Thread):
 
                 # -------------- To Create DICOM Thumbnail -----------
                 rvtk = vtkgdcm.vtkGDCMImageReader()
-                rvtk.SetFileName(filepath.encode(utils.get_encoding_operation()))
+                rvtk.SetFileName(filepath.encode(utils.get_system_encoding()))
                 rvtk.Update()
                 
                 try:
--
libgit2 0.21.2