diff --git a/chirp/drivers/radtel_rt490.py b/chirp/drivers/radtel_rt490.py
index a9fe76ab..9059a1a1 100644
--- a/chirp/drivers/radtel_rt490.py
+++ b/chirp/drivers/radtel_rt490.py
@@ -1301,6 +1301,7 @@ def get_features(self):  # GOOD ?
         rf.can_odd_split = True
         rf.has_name = True
         rf.valid_name_length = 12
+        rf.valid_characters = self._valid_chars
         rf.valid_skips = ["", "S"]
         rf.valid_tmodes = ["", "Tone", "TSQL", "DTCS", "Cross"]
         rf.valid_cross_modes = ["Tone->Tone", "DTCS->", "->DTCS", "Tone->DTCS",