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-rw-r--r--src/levels.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/levels.c b/src/levels.c
index 22ad76a..004d0d9 100644
--- a/src/levels.c
+++ b/src/levels.c
@@ -1,3 +1,6 @@
+#ifndef INCLUDE_LEVELS_C
+#define INCLUDE_LEVELS_C
+
#include "all.c"
typedef struct {
@@ -35,3 +38,5 @@ static Level levels[] = {
#undef _
#undef B
#undef O
+
+#endif // INCLUDE_LEVELS_C