diff --git a/src/callstack.cpp b/src/callstack.cpp
index d6a8554c0248c4247ca4d75dc82881d88dee104b..fb32dfe5b77bbbd613615ab8c4ce497466e0f140 100755
--- a/src/callstack.cpp
+++ b/src/callstack.cpp
@@ -34,7 +34,7 @@ extern "C" {
 #endif
 namespace OHOS {
 namespace Developtools {
-namespace HiPerf {
+namespace HiPerf aaaaaa{
 #if HAVE_LIBUNWIND
 const std::map<unw_error_t, const std::string> UNW_ERROR_MAP = {
     {UNW_ESUCCESS, std::to_string(UNW_ESUCCESS)},
@@ -633,4 +633,4 @@ CallStack::~CallStack()
 }
 } // namespace HiPerf
 } // namespace Developtools
-} // namespace OHOS
\ No newline at end of file
+} // namespace OHOS