diff --git a/adafruit_rtttl.py b/adafruit_rtttl.py
index 409af7c..5d5ca74 100644
--- a/adafruit_rtttl.py
+++ b/adafruit_rtttl.py
@@ -32,7 +32,7 @@
     except ImportError:
         audiocore = audioio
 except ImportError as e:
-    if not WAVEFORM_AVAILABLE:
+    if AUDIOIO_AVAILABLE and not WAVEFORM_AVAILABLE:
         raise e
 
 try: