diff --git a/components/bt/common/osi/include/osi/fixed_pkt_queue.h b/components/bt/common/osi/include/osi/fixed_pkt_queue.h
index f4235ca5d99..e121235eda2 100644
--- a/components/bt/common/osi/include/osi/fixed_pkt_queue.h
+++ b/components/bt/common/osi/include/osi/fixed_pkt_queue.h
@@ -76,4 +76,8 @@ void fixed_pkt_queue_unregister_dequeue(fixed_pkt_queue_t *queue);
 
 void fixed_pkt_queue_process(fixed_pkt_queue_t *queue);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/components/bt/host/bluedroid/bta/include/bta/bta_ar_api.h b/components/bt/host/bluedroid/bta/include/bta/bta_ar_api.h
index 2823d674e54..20f11281190 100644
--- a/components/bt/host/bluedroid/bta/include/bta/bta_ar_api.h
+++ b/components/bt/host/bluedroid/bta/include/bta/bta_ar_api.h
@@ -18,7 +18,7 @@
 
 /******************************************************************************
  *
- *  This is the public interface file for the simulatenous advanced
+ *  This is the public interface file for the simultaneous advanced
  *  audio/video streaming (AV) source and sink of BTA, Broadcom's Bluetooth
  *  application layer for mobile phones.
  *
@@ -35,6 +35,10 @@
 
 #if (BTA_AR_INCLUDED == TRUE)
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*****************************************************************************
 **  Constants and data types
 *****************************************************************************/
diff --git a/components/bt/host/bluedroid/btc/profile/std/include/btc_av_api.h b/components/bt/host/bluedroid/btc/profile/std/include/btc_av_api.h
index 72ee3bb7147..57d14fbf2d8 100644
--- a/components/bt/host/bluedroid/btc/profile/std/include/btc_av_api.h
+++ b/components/bt/host/bluedroid/btc/profile/std/include/btc_av_api.h
@@ -23,6 +23,9 @@
 #include "stack/a2d_sbc.h"
 
 #if (BTC_AV_INCLUDED == TRUE)
+#ifdef __cplusplus
+extern "C" {
+#endif
 /*****************************************************************************
  **  Constants and data types
  *****************************************************************************/
diff --git a/components/wpa_supplicant/esp_supplicant/include/esp_wpa2.h b/components/wpa_supplicant/esp_supplicant/include/esp_wpa2.h
index 032af02ef32..0dc0f1b9279 100644
--- a/components/wpa_supplicant/esp_supplicant/include/esp_wpa2.h
+++ b/components/wpa_supplicant/esp_supplicant/include/esp_wpa2.h
@@ -10,6 +10,9 @@
 #pragma message("esp_wpa2.h is deprecated. Use esp_eap_client.h instead.")
 
 #include "esp_eap_client.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /**
   * @brief  Enable wpa2 enterprise authentication.