diff --git a/engine/class_modules/sc_mage.cpp b/engine/class_modules/sc_mage.cpp
index 9aa985af1c4..abe37890bf1 100644
--- a/engine/class_modules/sc_mage.cpp
+++ b/engine/class_modules/sc_mage.cpp
@@ -2945,9 +2945,11 @@ struct arcane_explosion_t final : public arcane_mage_spell_t
 struct arcane_pulse_t final : public arcane_mage_spell_t
 {
   action_t* arcane_pulse_echo = nullptr;
+  const bool ac_affects_cast; // Delete whenever 12.0.5 goes live.
 
   arcane_pulse_t( std::string_view n, mage_t* p, std::string_view options_str, bool echo = false ) :
-    arcane_mage_spell_t( n, p, echo ? p->find_spell( 1243460 ) : p->talents.arcane_pulse )
+    arcane_mage_spell_t( n, p, echo ? p->find_spell( 1243460 ) : p->talents.arcane_pulse ),
+    ac_affects_cast( data().affected_by( p->buffs.arcane_charge->data().effectN( 4 ) ) )
   {
     parse_options( options_str );
     aoe = -1;
@@ -3010,6 +3012,17 @@ struct arcane_pulse_t final : public arcane_mage_spell_t
 
     return am;
   }
+
+  double execute_time_pct_multiplier() const override
+  {
+    double mul = arcane_mage_spell_t::execute_time_pct_multiplier();
+
+    // Unmentioned by tooltip
+    if ( ac_affects_cast )
+      mul *= 1.0 + p()->buffs.arcane_charge->check() * p()->buffs.arcane_charge->data().effectN( 4 ).percent();
+
+    return mul;
+  }
 };
 
 struct arcane_assault_t final : public arcane_mage_spell_t