diff --git a/adafruit_magtag/peripherals.py b/adafruit_magtag/peripherals.py
index 6ee9ead..50d9da3 100755
--- a/adafruit_magtag/peripherals.py
+++ b/adafruit_magtag/peripherals.py
@@ -76,8 +76,8 @@ def play_tone(self, frequency, duration):
         It will attempt to play the sound up to 3 times in the case of
         an error.
         """
-        if frequency <= 0:
-            raise ValueError("The frequency has to be greater than 0.")
+        if frequency < 0:
+            raise ValueError("Negative frequencies are not allowed.")
         self._speaker_enable.value = True
         attempt = 0
         # Try up to 3 times to play the sound