diff --git a/example/avdtp_sink_demo.c b/example/avdtp_sink_demo.c
index a48c3a971..fa8a15467 100644
--- a/example/avdtp_sink_demo.c
+++ b/example/avdtp_sink_demo.c
@@ -40,7 +40,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "btstack_config.h"
 #include "btstack_debug.h"
diff --git a/example/avdtp_source_demo.c b/example/avdtp_source_demo.c
index a64c1e09c..925b16738 100644
--- a/example/avdtp_source_demo.c
+++ b/example/avdtp_source_demo.c
@@ -40,7 +40,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "btstack_config.h"
 #include "btstack_debug.h"
diff --git a/example/hfp_ag_demo.c b/example/hfp_ag_demo.c
index 009faa7b7..44e4127a7 100644
--- a/example/hfp_ag_demo.c
+++ b/example/hfp_ag_demo.c
@@ -55,7 +55,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "btstack.h"
 #include "sco_demo_util.h"
diff --git a/src/classic/avrcp.c b/src/classic/avrcp.c
index 5d25d61d5..d83935157 100644
--- a/src/classic/avrcp.c
+++ b/src/classic/avrcp.c
@@ -41,7 +41,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "btstack.h"
 #include "classic/avrcp.h"