1 files changed, 7 insertions, 0 deletions
diff --git a/src/filter.h b/src/types/filter.h
index 5691f6c..c9e01bb 100644
--- a/src/filter.h
+++ b/src/types/filter.h
@@ -15,6 +15,10 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#ifndef TYPES_FILTER_H
+#define TYPES_FILTER_H
+
+
 #include <stddef.h>
 #include <stdint.h>
 
@@ -129,3 +133,6 @@ size_t filter_marshal(const struct filter* restrict this, void* restrict buf, si
 GCC_ONLY(__attribute__((nonnull)))
 size_t filter_unmarshal(struct filter* restrict this, const void* restrict buf, size_t ramps_size);
 
+
+#endif
+