diff --git a/server/gameserver/buff/callfunc.cc b/server/gameserver/buff/callfunc.cc
index cc4cbab7..c69a1055 100644
--- a/server/gameserver/buff/callfunc.cc
+++ b/server/gameserver/buff/callfunc.cc
@@ -132,16 +132,21 @@ void CallFuncBuff::ProcAddMinorMode()
         float dur_time = meta->GetBuffParam3(this);
         Skill* skill = owner->GetSkill(skill_meta->skill_id());
         if (skill) {
+            auto owner_ptr = owner->GetWeakPtrRef();
+            auto meta_ptr = meta;
+            auto skill_meta_ptr = skill_meta;
             skill->AddMinorMode
                 (
                  meta->_int_buff_param2,
                  dur_time * 1000,
-                 [this] (int action)
+                 [owner_ptr, meta_ptr, skill_meta_ptr] (int action) mutable
                  {
-                     if (action == 0) {
-                         owner->TryAddBuff(owner, meta->_int_buff_param4, skill_meta);
-                     } else if (action) {
-                         owner->TryAddBuff(owner, meta->_int_buff_param5, skill_meta);
+                     if (owner_ptr.Get()) {
+                         if (action == 1) {
+                             owner_ptr.Get()->TryAddBuff(owner_ptr.Get(), meta_ptr->_int_buff_param4, skill_meta_ptr);
+                         } else if (action) {
+                             owner_ptr.Get()->TryAddBuff(owner_ptr.Get(), meta_ptr->_int_buff_param5, skill_meta_ptr);
+                         }
                      }
                  });
         }
diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index 54e768cd..44c55138 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -828,8 +828,7 @@ bool Creature::CanUseSkill(int skill_id)
     if (HasBuffEffect(kBET_Vertigo) ||
         HasBuffEffect(kBET_Jump) ||
         HasBuffEffect(kBET_Fly) ||
-        HasBuffEffect(kBET_MachineGun) ||
-        HasBuffEffect(kBET_Sprint)) {
+        HasBuffEffect(kBET_MachineGun)) {
         return false;
     }
     if (skill->force_use_times > 0) {
diff --git a/server/gameserver/skill.cc b/server/gameserver/skill.cc
index f897a43b..56753a31 100644
--- a/server/gameserver/skill.cc
+++ b/server/gameserver/skill.cc
@@ -186,7 +186,9 @@ void Skill::AddMinorMode(
                  minor_type_ = SMT_NONE;
                  minor_cd_time_ = 0;
                  minor_frameno_ = 0;
-                 minor_cb_(0);
+                 if (minor_cb_) {
+                     minor_cb_(0);
+                 }
                  minor_cb_ = nullptr;
              }
          },