diff --git a/glances/outputs/glances_curses.py b/glances/outputs/glances_curses.py
index 07fee9f1..d6dd63ea 100644
--- a/glances/outputs/glances_curses.py
+++ b/glances/outputs/glances_curses.py
@@ -709,7 +709,14 @@ class GlancesCurses(object):
                 pass
             else:
                 # New column
-                x = x + len(m['msg'])
+                try:
+                    # Python 2: we need to decode to get real screen size because utf-8 special tree chars
+                    # occupy several bytes
+                    offset = len(m['msg'].decode("utf-8"))
+                except AttributeError:
+                    # Python 3: strings are strings and bytes are bytes, all is good
+                    offset = len(m['msg'])
+                x = x + offset
 
         # Compute the next Glances column/line position
         self.next_column = max(self.next_column, x + self.space_between_column)