diff --git a/include/common/Tracer.h b/include/common/Tracer.h
index 81c9266..c46ae05 100644
--- a/include/common/Tracer.h
+++ b/include/common/Tracer.h
@@ -21,10 +21,12 @@
 #include "opentelemetry/trace/span_id.h"
 #include "opentelemetry/trace/trace_id.h"
 
-namespace opentelemetry::trace {
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace trace {
 class Span;
 class Tracer;
-}  // namespace opentelemetry::trace
+}  // namespace trace
+OPENTELEMETRY_END_NAMESPACE
 
 #define TRACE_SERVICE_SEGCORE "segcore"
 
diff --git a/test/TracerTest.cpp b/test/TracerTest.cpp
index 93743b0..4a442a4 100644
--- a/test/TracerTest.cpp
+++ b/test/TracerTest.cpp
@@ -57,6 +57,12 @@ TEST(Tracer, Span) {
     delete[] ctx->spanID;
 }
 
+TEST(Tracer, AutoSpanParentConstructorUsesHeaderDeclaredSpanType) {
+    std::shared_ptr<milvus::tracer::trace::Span> parent;
+    AutoSpan span("header_abi_parent", parent, false);
+    ASSERT_NE(span.GetSpan(), nullptr);
+}
+
 TEST(Tracer, OwnedTraceSnapshotCopiesBytes) {
     uint8_t trace_id[16]{0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
                          0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};