diff --git a/src/battle_setup.c b/src/battle_setup.c
index a1b01f9c1..a9d4eeddf 100644
--- a/src/battle_setup.c
+++ b/src/battle_setup.c
@@ -46,6 +46,7 @@
 #include "constants/maps.h"
 #include "constants/trainers.h"
 #include "constants/trainer_hill.h"
+#include "constants/weather.h"
 
 enum {
     TRANSITION_TYPE_NORMAL,
@@ -686,7 +687,7 @@ u8 BattleSetup_GetTerrainId(void)
     }
     if (gSaveBlock1Ptr->location.mapGroup == MAP_GROUP(ROUTE113) && gSaveBlock1Ptr->location.mapNum == MAP_NUM(ROUTE113))
         return BATTLE_TERRAIN_SAND;
-    if (GetSav1Weather() == 8)
+    if (GetSav1Weather() == WEATHER_SANDSTORM)
         return BATTLE_TERRAIN_SAND;
 
     return BATTLE_TERRAIN_PLAIN;