diff --git a/include/z64collision_check.h b/include/z64collision_check.h
index 0fcf9f11df..5f472b4d04 100644
--- a/include/z64collision_check.h
+++ b/include/z64collision_check.h
@@ -88,7 +88,7 @@ typedef struct ColliderElementDamageInfoAT {
 
 typedef struct ColliderElementDamageInfoAC {
     /* 0x00 */ u32 dmgFlags; // Damage types that may affect this collider element as AC.
-    /* 0x04 */ u8 effect;  // Damage Effect (Knockback, Fire, etc.)
+    /* 0x04 */ u8 hitBacklash;  // The backlash type applied to other ATs touching this AC.
     /* 0x05 */ u8 defense; // Damage Resistance
     /* 0x06 */ Vec3s hitPos; // Point of contact
 } ColliderElementDamageInfoAC; // size = 0x0C
diff --git a/src/code/z_collision_check.c b/src/code/z_collision_check.c
index 2bd5082ed8..0cd014f372 100644
--- a/src/code/z_collision_check.c
+++ b/src/code/z_collision_check.c
@@ -194,7 +194,7 @@ s32 Collider_DestroyElementDamageInfoAC(PlayState* play, ColliderElementDamageIn
 s32 Collider_SetElementDamageInfoAC(PlayState* play, ColliderElementDamageInfoAC* acDmgInfo,
                                     ColliderElementDamageInfoACInit* init) {
     acDmgInfo->dmgFlags = init->dmgFlags;
-    acDmgInfo->effect = init->effect;
+    acDmgInfo->hitBacklash = init->effect;
     acDmgInfo->defense = init->defense;
     return true;
 }
@@ -1739,7 +1739,7 @@ s32 CollisionCheck_SetATvsAC(PlayState* play, Collider* atCol, ColliderElement*
         atElem->atHitElem = acElem;
         atElem->atElemFlags |= ATELEM_HIT;
         if (atCol->actor != NULL) {
-            atCol->actor->colChkInfo.atHitBacklash = acElem->acDmgInfo.effect;
+            atCol->actor->colChkInfo.atHitBacklash = acElem->acDmgInfo.hitBacklash;
         }
     }
     acCol->acFlags |= AC_HIT;
diff --git a/src/overlays/actors/ovl_En_Bili/z_en_bili.c b/src/overlays/actors/ovl_En_Bili/z_en_bili.c
index 82f7b62796..16b99cbef4 100644
--- a/src/overlays/actors/ovl_En_Bili/z_en_bili.c
+++ b/src/overlays/actors/ovl_En_Bili/z_en_bili.c
@@ -157,7 +157,7 @@ void EnBili_Destroy(Actor* thisx, PlayState* play) {
 
 void EnBili_SetupFloatIdle(EnBili* this) {
     this->actor.speed = 0.7f;
-    this->collider.elem.acDmgInfo.effect = 1; // Shock?
+    this->collider.elem.acDmgInfo.hitBacklash = 1; // Shock?
     this->timer = 32;
     this->actor.home.pos.y = this->actor.world.pos.y;
     this->actor.gravity = 0.0f;
@@ -253,7 +253,7 @@ void EnBili_SetupDie(EnBili* this) {
  */
 void EnBili_SetupStunned(EnBili* this) {
     this->timer = 80;
-    this->collider.elem.acDmgInfo.effect = 0;
+    this->collider.elem.acDmgInfo.hitBacklash = 0;
     this->actor.gravity = -1.0f;
     this->actor.speed = 0.0f;
     Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 150, COLORFILTER_BUFFLAG_XLU, 80);
diff --git a/src/overlays/actors/ovl_En_Vali/z_en_vali.c b/src/overlays/actors/ovl_En_Vali/z_en_vali.c
index 011b004b68..224b76d9e8 100644
--- a/src/overlays/actors/ovl_En_Vali/z_en_vali.c
+++ b/src/overlays/actors/ovl_En_Vali/z_en_vali.c
@@ -272,7 +272,7 @@ void EnVali_SetupStunned(EnVali* this) {
     this->timer = 80;
     this->actor.velocity.y = 0.0f;
     Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 255, COLORFILTER_BUFFLAG_XLU, 80);
-    this->bodyCollider.elem.acDmgInfo.effect = 0;
+    this->bodyCollider.elem.acDmgInfo.hitBacklash = 0;
     Actor_PlaySfx(&this->actor, NA_SE_EN_GOMA_JR_FREEZE);
     this->actor.velocity.y = 1.0f;
     this->actionFunc = EnVali_Stunned;
@@ -462,7 +462,7 @@ void EnVali_Stunned(EnVali* this, PlayState* play) {
     }
 
     if (this->timer == 0) {
-        this->bodyCollider.elem.acDmgInfo.effect = 1; // Shock?
+        this->bodyCollider.elem.acDmgInfo.hitBacklash = 1; // Shock?
         EnVali_SetupFloatIdle(this);
     }
 }