diff --git a/libraries/SocketWrapper/src/MbedSSLClient.cpp b/libraries/SocketWrapper/src/MbedSSLClient.cpp
index ae0b22163..0823bf781 100644
--- a/libraries/SocketWrapper/src/MbedSSLClient.cpp
+++ b/libraries/SocketWrapper/src/MbedSSLClient.cpp
@@ -1,7 +1,7 @@
 #include "MbedSSLClient.h"
 
 arduino::MbedSSLClient::MbedSSLClient()
-  : _ca_cert_custom(nullptr),
+  : _rootCA(nullptr),
     _hostname(nullptr),
     _clientCert(nullptr),
     _privateKey(nullptr),
diff --git a/libraries/SocketWrapper/src/MbedSSLClient.h b/libraries/SocketWrapper/src/MbedSSLClient.h
index 487017984..a6322941d 100644
--- a/libraries/SocketWrapper/src/MbedSSLClient.h
+++ b/libraries/SocketWrapper/src/MbedSSLClient.h
@@ -48,12 +48,12 @@ class MbedSSLClient : public arduino::MbedClient {
     _disableSNI = statusSNI;
   }
 
-  void appendCustomCACert(const char* ca_cert) {
-    _ca_cert_custom = ca_cert;
+  void appendCustomCACert(const char* rootCA) {
+    _rootCA = rootCA;
     _appendCA = true;
   }
   void setCACert(const char* rootCA) {
-    _ca_cert_custom = rootCA;
+    _rootCA = rootCA;
     _appendCA = false;
   }
   void setCertificate(const char* clientCert) {
@@ -64,7 +64,7 @@ class MbedSSLClient : public arduino::MbedClient {
   }
 
 protected:
-  const char* _ca_cert_custom;
+  const char* _rootCA;
   const char* _hostname;
   const char* _clientCert;
   const char* _privateKey;
@@ -86,8 +86,8 @@ class MbedSSLClient : public arduino::MbedClient {
       }
     }
 
-    if(!_appendCA && _ca_cert_custom) {
-      return ((TLSSocket*)sock)->set_root_ca_cert(_ca_cert_custom);
+    if(!_appendCA && _rootCA) {
+      return ((TLSSocket*)sock)->set_root_ca_cert(_rootCA);
     }
 
 #if defined(MBEDTLS_FS_IO)
@@ -111,8 +111,8 @@ class MbedSSLClient : public arduino::MbedClient {
     }
 #endif
 
-    if(_ca_cert_custom != NULL) {
-      err = ((TLSSocket*)sock)->append_root_ca_cert(_ca_cert_custom);
+    if(_rootCA != NULL) {
+      err = ((TLSSocket*)sock)->append_root_ca_cert(_rootCA);
     }
     return err;
   }