diff --git a/src/k_kart.c b/src/k_kart.c
index 920b236c0..e71bc53b4 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -415,7 +415,7 @@ void K_RegisterKartStuff(void)
 
 //}
 
-boolean K_IsPlayerLosing(player_t *player)
+boolean K_IsPlayerLosing(const player_t *player)
 {
 	INT32 winningpos = 1;
 	UINT8 i, pcount = 0;
diff --git a/src/k_kart.h b/src/k_kart.h
index e980edfb1..47830ee78 100644
--- a/src/k_kart.h
+++ b/src/k_kart.h
@@ -191,7 +191,7 @@ void K_RegisterKartStuff(void);
 
 void K_TimerInit(void);
 UINT32 K_GetPlayerDontDrawFlag(player_t *player);
-boolean K_IsPlayerLosing(player_t *player);
+boolean K_IsPlayerLosing(const player_t *player);
 fixed_t K_GetKartGameSpeedScalar(SINT8 value);
 
 fixed_t K_GetMobjWeight(mobj_t *mobj, mobj_t *against);