diff --git a/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp b/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp
index 101252c125f..a6814b0a60b 100644
--- a/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp
+++ b/libraries/WiFiClientSecure/src/WiFiClientSecure.cpp
@@ -264,10 +264,10 @@ void WiFiClientSecure::setCACert (const char *rootCA)
  {
     if (bundle != NULL)
     {
-        esp_crt_bundle_set(bundle);
+        arduino_esp_crt_bundle_set(bundle);
         _use_ca_bundle = true;
     } else {
-        esp_crt_bundle_detach(NULL);
+        arduino_esp_crt_bundle_detach(NULL);
         _use_ca_bundle = false;
     }
  }
diff --git a/libraries/WiFiClientSecure/src/esp_crt_bundle.c b/libraries/WiFiClientSecure/src/esp_crt_bundle.c
index 9a555b218d0..82a0708662c 100644
--- a/libraries/WiFiClientSecure/src/esp_crt_bundle.c
+++ b/libraries/WiFiClientSecure/src/esp_crt_bundle.c
@@ -176,7 +176,7 @@ static esp_err_t esp_crt_bundle_init(const uint8_t *x509_bundle)
     return ESP_OK;
 }
 
-esp_err_t esp_crt_bundle_attach(void *conf)
+esp_err_t arduino_esp_crt_bundle_attach(void *conf)
 {
     esp_err_t ret = ESP_OK;
     // If no bundle has been set by the user then use the bundle embedded in the binary
@@ -199,7 +199,7 @@ esp_err_t esp_crt_bundle_attach(void *conf)
     return ret;
 }
 
-void esp_crt_bundle_detach(mbedtls_ssl_config *conf)
+void arduino_esp_crt_bundle_detach(mbedtls_ssl_config *conf)
 {
     free(s_crt_bundle.crts);
     s_crt_bundle.crts = NULL;
@@ -208,7 +208,7 @@ void esp_crt_bundle_detach(mbedtls_ssl_config *conf)
     }
 }
 
-void esp_crt_bundle_set(const uint8_t *x509_bundle)
+void arduino_esp_crt_bundle_set(const uint8_t *x509_bundle)
 {
     // Free any previously used bundle
     free(s_crt_bundle.crts);
diff --git a/libraries/WiFiClientSecure/src/esp_crt_bundle.h b/libraries/WiFiClientSecure/src/esp_crt_bundle.h
index 33fb98b9969..a1d95194af4 100644
--- a/libraries/WiFiClientSecure/src/esp_crt_bundle.h
+++ b/libraries/WiFiClientSecure/src/esp_crt_bundle.h
@@ -36,7 +36,7 @@ extern "C" {
  *             - ESP_OK  if adding certificates was successful.
  *             - Other   if an error occured or an action must be taken by the calling process.
  */
-esp_err_t esp_crt_bundle_attach(void *conf);
+esp_err_t arduino_esp_crt_bundle_attach(void *conf);
 
 
 /**
@@ -46,7 +46,7 @@ esp_err_t esp_crt_bundle_attach(void *conf);
  *
  * @param[in]  conf      The config struct for the SSL connection.
  */
-void esp_crt_bundle_detach(mbedtls_ssl_config *conf);
+void arduino_esp_crt_bundle_detach(mbedtls_ssl_config *conf);
 
 
 /**
@@ -58,7 +58,7 @@ void esp_crt_bundle_detach(mbedtls_ssl_config *conf);
  *
  * @param[in]  x509_bundle     A pointer to the certificate bundle.
  */
-void esp_crt_bundle_set(const uint8_t *x509_bundle);
+void arduino_esp_crt_bundle_set(const uint8_t *x509_bundle);
 
 
 #ifdef __cplusplus
diff --git a/libraries/WiFiClientSecure/src/ssl_client.cpp b/libraries/WiFiClientSecure/src/ssl_client.cpp
index 95e4f023d93..299c47beaf1 100644
--- a/libraries/WiFiClientSecure/src/ssl_client.cpp
+++ b/libraries/WiFiClientSecure/src/ssl_client.cpp
@@ -193,7 +193,7 @@ int start_ssl_client(sslclient_context *ssl_client, const char *host, uint32_t p
         }
     } else if (useRootCABundle) {
         log_v("Attaching root CA cert bundle");
-        ret = esp_crt_bundle_attach(&ssl_client->ssl_conf);
+        ret = arduino_esp_crt_bundle_attach(&ssl_client->ssl_conf);
 
         if (ret < 0) {
             return handle_error(ret);