diff --git a/csdr/__init__.py b/csdr/__init__.py
index 1f4325ff..4eed983f 100644
--- a/csdr/__init__.py
+++ b/csdr/__init__.py
@@ -635,7 +635,7 @@ class Dsp(DirewolfConfigSubscriber):
         # no squelch required on digital voice modes
         actual_squelch = (
             -150
-            if self.isDigitalVoice() or self.isPacket() or self.isPocsag() or self.isFreeDV()
+            if self.isDigitalVoice() or self.isPacket() or self.isPocsag() or self.isFreeDV() or self.isDrm()
             else self.squelch_level
         )
         if self.running: