diff --git a/tls/client-tls13.c b/tls/client-tls13.c
index 283b0fe1..0aa79cad 100644
--- a/tls/client-tls13.c
+++ b/tls/client-tls13.c
@@ -46,7 +46,7 @@
 #endif
 
 /* Callback function for TLS v1.3 secrets for use with Wireshark */
-int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
+static int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
     int secretSz, void* ctx)
 {
     int i;
@@ -82,7 +82,7 @@ int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
     }
 
     fprintf(fp, "%s ", str);
-    for (i = 0; i < clientRandomSz; i++) {
+    for (i = 0; i < (int)clientRandomSz; i++) {
         fprintf(fp, "%02x", clientRandom[i]);
     }
     fprintf(fp, " ");
@@ -181,18 +181,18 @@ int main(int argc, char** argv)
         goto exit;
     }
 
+#ifdef HAVE_SECRET_CALLBACK
+    /* optional logging for wireshark */
+    wolfSSL_set_tls13_secret_cb(ssl, Tls13SecretCallback,
+        (void*)WOLFSSL_SSLKEYLOGFILE_OUTPUT);
+#endif
+
     /* Connect to wolfSSL on the server side */
     if ((ret = wolfSSL_connect(ssl)) != WOLFSSL_SUCCESS) {
         fprintf(stderr, "ERROR: failed to connect to wolfSSL\n");
         goto exit;
     }
 
-#ifdef HAVE_SECRET_CALLBACK
-    /* optional logging for wireshark */
-    wolfSSL_set_tls13_secret_cb(ssl, Tls13SecretCallback,
-        WOLFSSL_SSLKEYLOGFILE_OUTPUT);
-#endif
-
     /* Get a message for the server from stdin */
     printf("Message for server: ");
     memset(buff, 0, sizeof(buff));
diff --git a/tls/server-tls13.c b/tls/server-tls13.c
index 57f94fa7..b4df0e5f 100644
--- a/tls/server-tls13.c
+++ b/tls/server-tls13.c
@@ -47,7 +47,7 @@
 #endif
 
 /* Callback function for TLS v1.3 secrets for use with Wireshark */
-int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
+static int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
     int secretSz, void* ctx)
 {
     int i;
@@ -83,7 +83,7 @@ int Tls13SecretCallback(WOLFSSL* ssl, int id, const unsigned char* secret,
     }
 
     fprintf(fp, "%s ", str);
-    for (i = 0; i < serverRandomSz; i++) {
+    for (i = 0; i < (int)serverRandomSz; i++) {
         fprintf(fp, "%02x", serverRandom[i]);
     }
     fprintf(fp, " ");
@@ -198,7 +198,7 @@ int main(int argc, char** argv)
     #ifdef HAVE_SECRET_CALLBACK
         /* optional logging for wireshark */
         wolfSSL_set_tls13_secret_cb(ssl, Tls13SecretCallback,
-            WOLFSSL_SSLKEYLOGFILE_OUTPUT);
+            (void*)WOLFSSL_SSLKEYLOGFILE_OUTPUT);
     #endif
 
         /* Establish TLS connection */