diff --git a/seeed-voicecard b/seeed-voicecard
index f8c3986..79a3551 100755
--- a/seeed-voicecard
+++ b/seeed-voicecard
@@ -150,6 +150,6 @@ fi
 alsactl restore
 
 #Force 3.5mm ('headphone') jack
-if [[ "$kernel_ver" =~ ^4\.*$ ]]; then
+if aplay -l | grep -q "bcm2835 ALSA"; then
     amixer cset numid=3 1 || true
 fi