diff --git a/RtAudio.cpp b/RtAudio.cpp
index af7d205..7bc009d 100644
--- a/RtAudio.cpp
+++ b/RtAudio.cpp
@@ -6815,6 +6815,7 @@ RtAudio::DeviceInfo RtApiAlsa :: getDeviceInfo( unsigned int device )
 
   // Count cards and devices
   card = -1;
+  subdevice = -1;
   snd_card_next( &card );
   while ( card >= 0 ) {
     sprintf( name, "hw:%d", card );