diff --git a/src/k_kart.c b/src/k_kart.c
index 2b1eb3aa1..99f74b751 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -19,7 +19,7 @@
 #include "p_setup.h"
 #include "r_draw.h"
 #include "r_local.h"
-#include "r_things.c"
+#include "r_things.h"
 #include "s_sound.h"
 #include "st_stuff.h"
 #include "v_video.h"