diff --git a/include/battle.h b/include/battle.h
index f4c5bd997e..68beaf219f 100644
--- a/include/battle.h
+++ b/include/battle.h
@@ -450,7 +450,7 @@ STATIC_ASSERT(sizeof(((struct BattleStruct *)0)->palaceFlags) * 8 >= MAX_BATTLER
 
 #define DYNAMIC_TYPE_MASK                 ((1 << 6) - 1)
 #define F_DYNAMIC_TYPE_IGNORE_PHYSICALITY  (1 << 6) // If set, the dynamic type's physicality won't be used for certain move effects.
-#define F_DYNAMIC_TYPE_UNREAD              (1 << 7) // Set for Hidden Power and Weather Ball but never apparently checked.
+#define F_DYNAMIC_TYPE_SET                 (1 << 7) // Set for all dynamic types to distinguish a dynamic type of Normal (0) from no dynamic type.
 
 #define GET_MOVE_TYPE(move, typeArg)                                  \
 {                                                                     \
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index fd87e94e2a..96ae0e68a3 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -8841,7 +8841,7 @@ static void Cmd_hiddenpowercalc(void)
     gBattleStruct->dynamicMoveType = ((NUMBER_OF_MON_TYPES - 3) * typeBits) / 63 + 1;
     if (gBattleStruct->dynamicMoveType >= TYPE_MYSTERY)
         gBattleStruct->dynamicMoveType++;
-    gBattleStruct->dynamicMoveType |= F_DYNAMIC_TYPE_IGNORE_PHYSICALITY | F_DYNAMIC_TYPE_UNREAD;
+    gBattleStruct->dynamicMoveType |= F_DYNAMIC_TYPE_IGNORE_PHYSICALITY | F_DYNAMIC_TYPE_SET;
 
     gBattlescriptCurrInstr++;
 }
@@ -9718,15 +9718,15 @@ static void Cmd_setweatherballtype(void)
         if (gBattleWeather & B_WEATHER_ANY)
             gBattleScripting.dmgMultiplier = 2;
         if (gBattleWeather & B_WEATHER_RAIN)
-            *(&gBattleStruct->dynamicMoveType) = TYPE_WATER | F_DYNAMIC_TYPE_UNREAD;
+            *(&gBattleStruct->dynamicMoveType) = TYPE_WATER | F_DYNAMIC_TYPE_SET;
         else if (gBattleWeather & B_WEATHER_SANDSTORM)
-            *(&gBattleStruct->dynamicMoveType) = TYPE_ROCK | F_DYNAMIC_TYPE_UNREAD;
+            *(&gBattleStruct->dynamicMoveType) = TYPE_ROCK | F_DYNAMIC_TYPE_SET;
         else if (gBattleWeather & B_WEATHER_SUN)
-            *(&gBattleStruct->dynamicMoveType) = TYPE_FIRE | F_DYNAMIC_TYPE_UNREAD;
+            *(&gBattleStruct->dynamicMoveType) = TYPE_FIRE | F_DYNAMIC_TYPE_SET;
         else if (gBattleWeather & B_WEATHER_HAIL)
-            *(&gBattleStruct->dynamicMoveType) = TYPE_ICE | F_DYNAMIC_TYPE_UNREAD;
+            *(&gBattleStruct->dynamicMoveType) = TYPE_ICE | F_DYNAMIC_TYPE_SET;
         else
-            *(&gBattleStruct->dynamicMoveType) = TYPE_NORMAL | F_DYNAMIC_TYPE_UNREAD;
+            *(&gBattleStruct->dynamicMoveType) = TYPE_NORMAL | F_DYNAMIC_TYPE_SET;
     }
 
     gBattlescriptCurrInstr++;