diff --git a/TermTk/TTkGui/textcursor.py b/TermTk/TTkGui/textcursor.py
index 0ed2fc65..8c5d68f6 100644
--- a/TermTk/TTkGui/textcursor.py
+++ b/TermTk/TTkGui/textcursor.py
@@ -459,7 +459,7 @@ class TTkTextCursor():
                 splitAfter =  self._document._dataLines[line].substring(fr=pos)
                 xFrom = pos
                 xTo   = pos
-                selectRE = '[^ \t\r\n\(\)\[\]\.\,\+\-\*\/]*'
+                selectRE = r'[^ \t\r\n()[\]\.\,\+\-\*\/]*'
                 if m := splitBefore.search(selectRE+'$'):
                     xFrom -= len(m.group(0))
                 if m := splitAfter.search('^'+selectRE):
diff --git a/TermTk/TTkWidgets/TTkModelView/filetreewidgetitem.py b/TermTk/TTkWidgets/TTkModelView/filetreewidgetitem.py
index bffd6ef1..4ea80aeb 100644
--- a/TermTk/TTkWidgets/TTkModelView/filetreewidgetitem.py
+++ b/TermTk/TTkWidgets/TTkModelView/filetreewidgetitem.py
@@ -49,7 +49,7 @@ class TTkFileTreeWidgetItem(TTkTreeWidgetItem):
 
     def _processFilter(self, filter):
         if self.getType() == TTkFileTreeWidgetItem.FILE:
-            filterRe = "^"+filter.replace('.','\.').replace('*','.*')+"$"
+            filterRe = "^"+filter.replace('.',r'\.').replace('*','.*')+"$"
             if re.match(filterRe, self._raw[0]):
                 self.setHidden(False)
             else:
diff --git a/TermTk/TTkWidgets/lineedit.py b/TermTk/TTkWidgets/lineedit.py
index 5d039a36..e6aedcb4 100644
--- a/TermTk/TTkWidgets/lineedit.py
+++ b/TermTk/TTkWidgets/lineedit.py
@@ -157,7 +157,7 @@ class TTkLineEdit(TTkWidget):
         self._selectionFrom = len(before)
         self._selectionTo = len(before)
 
-        selectRE = '[^ \t\r\n\(\)\[\]\.\,\+\-\*\/]*'
+        selectRE = r'[^ \t\r\n()[\]\.\,\+\-\*\/]*'
 
         if m := before.search(selectRE+'$'):
             self._selectionFrom -= len(m.group(0))