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-rw-r--r--src/chunk.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/chunk.hpp b/src/chunk.hpp
index 2fe78f0..b2b80f8 100644
--- a/src/chunk.hpp
+++ b/src/chunk.hpp
@@ -11,6 +11,7 @@
#include <string>
#include <map>
+#define INVALID -1
#define AIR 0
#define DIRT 1