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-rw-r--r--src/heretic/r_things.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/heretic/r_things.c b/src/heretic/r_things.c
index 50db34af..a3bf3c19 100644
--- a/src/heretic/r_things.c
+++ b/src/heretic/r_things.c
@@ -25,6 +25,7 @@
#include <stdlib.h>
#include "doomdef.h"
#include "i_swap.h"
+#include "i_system.h"
#include "r_local.h"
void R_DrawColumn(void);