diff --git a/include/constants/pokemon.h b/include/constants/pokemon.h
index 51ef0c015b..1f66b83aa2 100644
--- a/include/constants/pokemon.h
+++ b/include/constants/pokemon.h
@@ -348,4 +348,6 @@
 
 #define MON_PIC_SIZE (64 * 64 / 2)
 
+#define NUM_ABILITY_SLOTS 2
+
 #endif // GUARD_CONSTANTS_POKEMON_H
diff --git a/include/pokemon.h b/include/pokemon.h
index 82cdefeac8..6e1d83576d 100644
--- a/include/pokemon.h
+++ b/include/pokemon.h
@@ -200,7 +200,7 @@ struct BaseStats
  /* 0x13 */ u8 growthRate;
  /* 0x14 */ u8 eggGroup1;
  /* 0x15 */ u8 eggGroup2;
- /* 0x16 */ u8 abilities[2];
+ /* 0x16 */ u8 abilities[NUM_ABILITY_SLOTS];
  /* 0x18 */ u8 safariZoneFleeRate;
  /* 0x19 */ u8 bodyColor : 7;
             u8 noFlip : 1;