1 files changed, 4 insertions, 0 deletions
diff --git a/hw/baum.h b/hw/baum.h
index 8af710f..7635884 100644
--- a/hw/baum.h
+++ b/hw/baum.h
@@ -21,6 +21,10 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+#ifndef HW_BAUM_H
+#define HW_BAUM_H 1
 
 /* char device */
 CharDriverState *chr_baum_init(QemuOpts *opts);
+
+#endif