diff --git a/nimble/host/services/bleuart/src/bleuart.c b/nimble/host/services/bleuart/src/bleuart.c
index d481a8641..158563528 100644
--- a/nimble/host/services/bleuart/src/bleuart.c
+++ b/nimble/host/services/bleuart/src/bleuart.c
@@ -20,6 +20,7 @@
 #include <assert.h>
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "sysinit/sysinit.h"
 #include "host/ble_hs.h"
diff --git a/nimble/host/src/ble_att_priv.h b/nimble/host/src/ble_att_priv.h
index 8ab15b101..03bbb1bc1 100644
--- a/nimble/host/src/ble_att_priv.h
+++ b/nimble/host/src/ble_att_priv.h
@@ -22,6 +22,7 @@
 
 #include <inttypes.h>
 #include "stats/stats.h"
+#include "os/os_time.h"
 #include "os/queue.h"
 #include "host/ble_att.h"
 #include "host/ble_uuid.h"
diff --git a/nimble/host/src/ble_att_svr.c b/nimble/host/src/ble_att_svr.c
index e2d2c9a80..a08b8848e 100644
--- a/nimble/host/src/ble_att_svr.c
+++ b/nimble/host/src/ble_att_svr.c
@@ -17,6 +17,7 @@
  * under the License.
  */
 
+#include <stdlib.h>
 #include <string.h>
 #include <errno.h>
 #include "os/os.h"
diff --git a/nimble/host/src/ble_gatts.c b/nimble/host/src/ble_gatts.c
index 196aaa7c8..fa1921e24 100644
--- a/nimble/host/src/ble_gatts.c
+++ b/nimble/host/src/ble_gatts.c
@@ -18,6 +18,7 @@
  */
 
 #include <stddef.h>
+#include <stdlib.h>
 #include <string.h>
 #include "nimble/ble.h"
 #include "host/ble_uuid.h"