diff --git a/fs/httpfs/httpfs.cpp b/fs/httpfs/httpfs.cpp
index 5a6ff0d7..bf0dfab0 100644
--- a/fs/httpfs/httpfs.cpp
+++ b/fs/httpfs/httpfs.cpp
@@ -252,7 +252,9 @@ class HttpFile : public fs::VirtualReadOnlyFile {
     }
 
     void add_header(va_list args) {
-        common_header[va_arg(args, const char*)] = va_arg(args, const char*);
+        auto k = va_arg(args, const char*);
+        auto v = va_arg(args, const char*);
+        common_header[k] = v;
     }
 
     void add_url_param(va_list args) { url_param = va_arg(args, const char*); }
diff --git a/fs/httpfs/httpfs_v2.cpp b/fs/httpfs/httpfs_v2.cpp
index 99b50169..4ec0ebf9 100644
--- a/fs/httpfs/httpfs_v2.cpp
+++ b/fs/httpfs/httpfs_v2.cpp
@@ -222,7 +222,9 @@ class HttpFile_v2 : public fs::VirtualReadOnlyFile {
 
     //TODO: 这里是否需要考虑m_common_header被打爆的问题？
     void add_header(va_list args) {
-        m_common_header.insert(va_arg(args, const char*), va_arg(args, const char*));
+        auto k = va_arg(args, const char*);
+        auto v = va_arg(args, const char*);
+        m_common_header.insert(k, v);
     }
 
     void add_url_param(va_list args) { m_url_param = va_arg(args, const char*); }