diff --git a/src/ssl.c b/src/ssl.c
index cf53a5a06..8d45ebd13 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -10476,9 +10476,11 @@ int wolfSSL_set_session_secret_cb(WOLFSSL* ssl, SessionSecretCb cb, void* ctx)
 
     ssl->sessionSecretCb = cb;
     ssl->sessionSecretCtx = ctx;
-    /* If using a pre-set key, assume session resumption. */
-    ssl->session->sessionIDSz = 0;
-    ssl->options.resuming = 1;
+    if (cb != NULL) {
+        /* If using a pre-set key, assume session resumption. */
+        ssl->session->sessionIDSz = 0;
+        ssl->options.resuming = 1;
+    }
 
     return WOLFSSL_SUCCESS;
 }