diff --git a/native/com_wolfssl_WolfSSLCertRequest.c b/native/com_wolfssl_WolfSSLCertRequest.c
index 9d87cd1..ab8db94 100644
--- a/native/com_wolfssl_WolfSSLCertRequest.c
+++ b/native/com_wolfssl_WolfSSLCertRequest.c
@@ -509,6 +509,7 @@ JNIEXPORT jbyteArray JNICALL Java_com_wolfssl_WolfSSLCertRequest_X509_1REQ_1get_
     if (derArr == NULL) {
         throwWolfSSLJNIException(jenv,
             "Failed to create byte array in native X509_REQ_get_der");
+        XFREE(der, NULL, DYNAMIC_TYPE_OPENSSL);
         return NULL;
     }