diff --git a/trunk/auto/utest.sh b/trunk/auto/utest.sh
index e7ce6a4a1..f29d698ba 100755
--- a/trunk/auto/utest.sh
+++ b/trunk/auto/utest.sh
@@ -49,7 +49,7 @@ USER_DIR = .
 CPPFLAGS += -I\$(GTEST_DIR)/include
 
 # Flags passed to the C++ compiler.
-CXXFLAGS += ${CXXFLAGS} -Wextra ${UTEST_EXTRA_DEFINES}
+CXXFLAGS += ${CXXFLAGS} ${UTEST_EXTRA_DEFINES} -Wno-unused-private-field -Wno-unused-command-line-argument
 
 # All tests produced by this Makefile.  Remember to add new tests you
 # created to the list.
diff --git a/trunk/src/utest/srs_utest.hpp b/trunk/src/utest/srs_utest.hpp
index bf2f26c8a..252c9928f 100644
--- a/trunk/src/utest/srs_utest.hpp
+++ b/trunk/src/utest/srs_utest.hpp
@@ -24,6 +24,12 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #ifndef SRS_UTEST_PUBLIC_SHARED_HPP
 #define SRS_UTEST_PUBLIC_SHARED_HPP
 
+// Before define the private/protected, we must include some system header files.
+// Or it may fail with:
+//      redeclared with different access struct __xfer_bufptrs
+// @see https://stackoverflow.com/questions/47839718/sstream-redeclared-with-public-access-compiler-error
+#include "gtest/gtest.h"
+
 // Public all private and protected members.
 #define private public
 #define protected public
@@ -33,7 +39,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include <srs_core.hpp>
 
-#include "gtest/gtest.h"
 #include <string>
 using namespace std;