diff --git a/main.c b/main.c
index 650f14e..b8983f6 100644
--- a/main.c
+++ b/main.c
@@ -78,7 +78,7 @@ struct lo_layer
   struct lo_layer *next;
   char *path;
   int fd;
-  int low;
+  bool low;
 };
 
 struct lo_mapping