diff --git a/src/engine/fox_enmy.c b/src/engine/fox_enmy.c
index e5b1f318..6224403a 100644
--- a/src/engine/fox_enmy.c
+++ b/src/engine/fox_enmy.c
@@ -1498,7 +1498,11 @@ void ActorMissileSeek_Update(Actor* this) {
     Vec3f sp98;
     Vec3f sp8C;
     f32 sp88;
+#ifdef AVOID_UB
+    f32 sp84 = 0;
+#else
     f32 sp84;
+#endif
     f32 sp80;
     f32 sp7C;
     f32 sp78;