diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 621b2c2312..e967923931 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -3350,7 +3350,10 @@ void SetMoveEffect(bool32 primary, bool32 certain)
             case MOVE_EFFECT_SP_DEF_MINUS_1:
             case MOVE_EFFECT_ACC_MINUS_1:
             case MOVE_EFFECT_EVS_MINUS_1:
-                flags = affectsUser;
+                if (affectsUser == MOVE_EFFECT_AFFECTS_USER)
+                    flags = MOVE_EFFECT_AFFECTS_USER | MOVE_EFFECT_CERTAIN;
+                else
+                    flags = 0;
                 if (mirrorArmorReflected)
                     flags |= (STAT_CHANGE_ALLOW_PTR * !affectsUser);
                 else
@@ -3400,7 +3403,10 @@ void SetMoveEffect(bool32 primary, bool32 certain)
             case MOVE_EFFECT_SP_DEF_MINUS_2:
             case MOVE_EFFECT_ACC_MINUS_2:
             case MOVE_EFFECT_EVS_MINUS_2:
-                flags = affectsUser;
+                if (affectsUser == MOVE_EFFECT_AFFECTS_USER)
+                    flags = MOVE_EFFECT_AFFECTS_USER | MOVE_EFFECT_CERTAIN;
+                else
+                    flags = 0;
                 if (mirrorArmorReflected && !affectsUser)
                     flags |= STAT_CHANGE_ALLOW_PTR;
                 if (ChangeStatBuffs(SET_STAT_BUFF_VALUE(2) | STAT_BUFF_NEGATIVE,