diff --git a/sdk/sign_tool/SignTool/sign_tool.cpp b/sdk/sign_tool/SignTool/sign_tool.cpp
index a2907990..7bf0ee05 100644
--- a/sdk/sign_tool/SignTool/sign_tool.cpp
+++ b/sdk/sign_tool/SignTool/sign_tool.cpp
@@ -100,7 +100,9 @@ typedef enum _file_path_t
 static int load_enclave(BinParser *parser, metadata_t *metadata)
 {
     std::unique_ptr<CLoader> ploader(new CLoader(const_cast<uint8_t *>(parser->get_start_addr()), *parser));
-    return ploader->load_enclave_ex(NULL, 0, metadata, NULL,  0, NULL);
+    int ret = ploader->load_enclave_ex(NULL, 0, metadata, NULL,  0, NULL);
+    delete parser;
+    return ret;
 }