diff --git a/java/GmSSL.c b/java/GmSSL.c
index 00fde527..3d3ce615 100755
--- a/java/GmSSL.c
+++ b/java/GmSSL.c
@@ -424,6 +424,7 @@ end:
 	if (keybuf) (*env)->ReleaseByteArrayElements(env, key, (jbyte *)keybuf, JNI_ABORT);
 	if (inbuf) (*env)->ReleaseByteArrayElements(env, in, (jbyte *)inbuf, JNI_ABORT);
 	if (ivbuf) (*env)->ReleaseByteArrayElements(env, iv, (jbyte *)ivbuf, JNI_ABORT);
+	OPENSSL_free(outbuf);
 	EVP_CIPHER_CTX_free(cctx);
 	return ret;
 }