diff --git a/asm/field_map_obj.s b/asm/field_map_obj.s
index 53565e334d..def08bb9c3 100644
--- a/asm/field_map_obj.s
+++ b/asm/field_map_obj.s
@@ -5,21 +5,6 @@
 
 	.text
 
-	thumb_func_start FieldObjectGetLocalIdAndMap
-@ void FieldObjectGetLocalIdAndMap(struct npc_state *fieldObject, u8 *localId, u8 *mapId, u8 *mapGroupId)
-FieldObjectGetLocalIdAndMap: @ 808E748
-	push {r4,lr}
-	ldrb r4, [r0, 0x8]
-	strb r4, [r1]
-	ldrb r1, [r0, 0x9]
-	strb r1, [r2]
-	ldrb r0, [r0, 0xA]
-	strb r0, [r3]
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end FieldObjectGetLocalIdAndMap
-
 	thumb_func_start sub_808E75C
 sub_808E75C: @ 808E75C
 	push {lr}
diff --git a/src/field_map_obj.c b/src/field_map_obj.c
index bac056ee67..94e2fb694d 100644
--- a/src/field_map_obj.c
+++ b/src/field_map_obj.c
@@ -1044,3 +1044,10 @@ void npc_by_local_id_and_map_set_field_1_bit_x20(u8 localId, u8 mapNum, u8 mapGr
         gMapObjects[mapObjectId].mapobj_bit_13 = state;
     }
 }
+
+void FieldObjectGetLocalIdAndMap(struct MapObject *mapObject, u8 *localId, u8 *mapNum, u8 *mapGroup)
+{
+    *localId = mapObject->localId;
+    *mapNum = mapObject->mapNum;
+    *mapGroup = mapObject->mapGroup;
+}