1 files changed, 5 insertions, 0 deletions
diff --git a/src/tick.c b/src/tick.c
index 8b8f731..4b255df 100644
--- a/src/tick.c
+++ b/src/tick.c
@@ -1,3 +1,6 @@
+#ifndef INCLUDE_TICK_C
+#define INCLUDE_TICK_C
+
 #include "all.c"
 
 static int isRed(int cell) {
@@ -333,3 +336,5 @@ static void tick(Game *game, Arena a) {
 		// TODO: Win conditions
 	}
 }
+
+#endif // INCLUDE_TICK_C