diff --git a/example/hsp_ag_demo.c b/example/hsp_ag_demo.c
index 2503b4547..0673068cf 100644
--- a/example/hsp_ag_demo.c
+++ b/example/hsp_ag_demo.c
@@ -282,6 +282,7 @@ int btstack_main(int argc, const char * argv[]){
     (void)argv;
 
     sco_demo_init();
+    sco_demo_set_codec(HFP_CODEC_CVSD);
 
     l2cap_init();
 
diff --git a/example/hsp_hs_demo.c b/example/hsp_hs_demo.c
index a80de98c4..2f6d80d23 100644
--- a/example/hsp_hs_demo.c
+++ b/example/hsp_hs_demo.c
@@ -279,6 +279,7 @@ int btstack_main(int argc, const char * argv[]){
     (void)argv;
 
     sco_demo_init();
+    sco_demo_set_codec(HFP_CODEC_CVSD);
 
     l2cap_init();