diff --git a/src/core/api/coap_secure_api.cpp b/src/core/api/coap_secure_api.cpp
index 86f76b4c9..2ba31a262 100644
--- a/src/core/api/coap_secure_api.cpp
+++ b/src/core/api/coap_secure_api.cpp
@@ -171,7 +171,7 @@ void otCoapSecureSetClientConnectedCallback(otInstance                     *aIns
                                             otHandleCoapSecureClientConnect aHandler,
                                             void                           *aContext)
 {
-    AsCoreType(aInstance).GetApplicationCoapSecure().SetClientConnectedCallback(aHandler, aContext);
+    AsCoreType(aInstance).GetApplicationCoapSecure().SetConnectedCallback(aHandler, aContext);
 }
 
 void otCoapSecureSetDefaultHandler(otInstance *aInstance, otCoapRequestHandler aHandler, void *aContext)
diff --git a/src/core/coap/coap_secure.hpp b/src/core/coap/coap_secure.hpp
index 21255dfe9..e34ce89ea 100644
--- a/src/core/coap/coap_secure.hpp
+++ b/src/core/coap/coap_secure.hpp
@@ -258,18 +258,6 @@ public:
     }
 #endif // defined(MBEDTLS_BASE64_C) && defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
 
-    /**
-     * Sets the connected callback to indicate, when a Client connect to the CoAP Secure server.
-     *
-     * @param[in]  aCallback     A pointer to a function that will be called once DTLS connection is established.
-     * @param[in]  aContext      A pointer to arbitrary context information.
-     *
-     */
-    void SetClientConnectedCallback(ConnectedCallback aCallback, void *aContext)
-    {
-        mConnectedCallback.Set(aCallback, aContext);
-    }
-
     /**
      * Sets the authentication mode for the CoAP secure connection. It disables or enables the verification
      * of peer certificate.