1 files changed, 6 insertions, 0 deletions
diff --git a/layer.h b/layer.h
index 3415cf94..4d602126 100644
--- a/layer.h
+++ b/layer.h
@@ -1,6 +1,12 @@
+#ifndef NAVIT_LAYER_H
+#define NAVIT_LAYER_H
+
 enum layer_type {
 	layer_town=0,
 	layer_street,
 	layer_poly,
 	layer_end,
 };
+
+#endif
+