diff --git a/src/object/whiteTriangleEffect.c b/src/object/whiteTriangleEffect.c
index 16ba562c1..ec70dab3f 100644
--- a/src/object/whiteTriangleEffect.c
+++ b/src/object/whiteTriangleEffect.c
@@ -35,7 +35,7 @@ typedef struct {
     u16 unk_9;
 } struct_081215E8;
 
-extern void sub_0801E49C(u32, u32, u32, u32);
+extern void sub_0801E49C(s32 baseX, s32 baseY, s32 radius, u32 baseAngle);
 extern bool32 gUnk_02036BB8;
 
 void sub_0808C6D4(WhiteTriangleEffectEntity*);