diff --git a/include/svs/extensions/vamana/scalar.h b/include/svs/extensions/vamana/scalar.h
index 94948ee4..021dec30 100644
--- a/include/svs/extensions/vamana/scalar.h
+++ b/include/svs/extensions/vamana/scalar.h
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#pragma once
+
 #include "svs/index/vamana/extensions.h"
 #include "svs/quantization/scalar/scalar.h"