diff --git a/src/core/lib/transport/metadata_info.cc b/src/core/lib/transport/metadata_info.cc
index 851cc62e9c9..6bba4ae2b4f 100644
--- a/src/core/lib/transport/metadata_info.cc
+++ b/src/core/lib/transport/metadata_info.cc
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include <grpc/support/port_platform.h>
+
 #include "src/core/lib/transport/metadata_info.h"
 
 #include "src/core/lib/slice/slice.h"