diff --git a/libs/pyTermTk/TermTk/TTkCore/canvas.py b/libs/pyTermTk/TermTk/TTkCore/canvas.py
index 0ab50682..0939a735 100644
--- a/libs/pyTermTk/TermTk/TTkCore/canvas.py
+++ b/libs/pyTermTk/TermTk/TTkCore/canvas.py
@@ -705,7 +705,7 @@ class TTkCanvas():
         # TTkLog.debug("pushToTerminal")
         lastcolor = TTkColor.RST
         for y in range(0, self._height):
-            ansi = lastcolor+TTkTerm.Cursor.moveTo(y+1,1)
+            ansi = str(lastcolor)+TTkTerm.Cursor.moveTo(y+1,1)
             for x in range(0, self._width):
                 ch = self._data[y][x]
                 color = self._colors[y][x]