diff --git a/src/pages/1-samples_selection.py b/src/pages/1-samples_selection.py
index 9c70710fe5f92d2ac9a493b554c9411140992528..180ba872301355b766f7386837f29e55238b83ac 100644
--- a/src/pages/1-samples_selection.py
+++ b/src/pages/1-samples_selection.py
@@ -52,7 +52,7 @@ if not file:
 
 else:
     # extension = file.name.split(".")[-1]
-    userfilename = file.name.replace(f".{file.name.split(".")[-1]}", '')
+    userfilename = file.name.replace("."+file.name.split(".")[-1], '')
 
     match file.name.split(".")[-1]:
         # Load .csv file