diff --git a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
index eeedcb4e24..08ede06b29 100644
--- a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
+++ b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
@@ -2696,7 +2696,8 @@ void BossMo_DrawCore(Actor* thisx, PlayState* play) {
         sp84 = this->subCamAt.z - this->subCamEye.z;
         temp = SQ(sp8C) + SQ(sp84);
         sp7C = Math_FAtan2F(sp8C, sp84);
-        sp78 = -Math_FAtan2F(sp88, sqrtf(temp));
+        temp = sqrtf(temp);
+        sp78 = -Math_FAtan2F(sp88, temp);
 
         sp6C.x = 0.0f;
         sp6C.y = 0.0f;