diff --git a/src/include/game/chraction.h b/src/include/game/chraction.h
index 93bda1388..ccffbbb88 100644
--- a/src/include/game/chraction.h
+++ b/src/include/game/chraction.h
@@ -291,7 +291,6 @@ f32 chrGetDistanceToTarget(struct chrdata *chr);
 f32 chrGetDistanceToTarget2(struct chrdata *chr);
 f32 chrGetDistanceToCurrentPlayer(struct chrdata *chr);
 f32 propGetDistanceToProp(struct prop *a, struct prop *b);
-f32 propGetLateralDistanceToProp(struct prop *a, struct prop *b);
 f32 chrGetDistanceToPad(struct chrdata *chr, s32 pad_id);
 f32 chrGetSquaredDistanceToPad(struct chrdata *chr, s32 pad_id);
 f32 chrGetDistanceToCoord(struct chrdata *chr, struct coord *pos);