diff --git a/bmc_mode_enum.hpp b/bmc_mode_enum.hpp
index d264c3a..dbad89b 100644
--- a/bmc_mode_enum.hpp
+++ b/bmc_mode_enum.hpp
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#pragma once
+
 #include <cstdint>
 
 namespace google