diff --git a/src/modules/SD2/include/sc_instance.cpp b/src/modules/SD2/include/sc_instance.cpp
index 360a6d83..27a06322 100644
--- a/src/modules/SD2/include/sc_instance.cpp
+++ b/src/modules/SD2/include/sc_instance.cpp
@@ -222,9 +222,9 @@ GameObject* ScriptedInstance::GetSingleGameObjectFromStorage(uint32 uiEntry)
 }
 
 /// Returns a pointer to a loaded Creature that was stored in m_mGoEntryGuidStore. Can return NULL
-Creature* ScriptedInstance::GetSingleCreatureFromStorage(uint32 uiEntry, bool bSkipDebugLog /*=false*/)
+Creature* ScriptedInstance::GetSingleCreatureFromStorage(uint32 uiEntry, bool bSkipDebugLog /*=false*/) const
 {
-    EntryGuidMap::iterator find = m_mNpcEntryGuidStore.find(uiEntry);
+    EntryGuidMap::const_iterator find = m_mNpcEntryGuidStore.find(uiEntry);
     if (find != m_mNpcEntryGuidStore.end())
     {
         return instance->GetCreature(find->second);
diff --git a/src/modules/SD2/include/sc_instance.h b/src/modules/SD2/include/sc_instance.h
index c4a77655..8a9882bc 100644
--- a/src/modules/SD2/include/sc_instance.h
+++ b/src/modules/SD2/include/sc_instance.h
@@ -52,7 +52,7 @@ class ScriptedInstance : public InstanceData
 
         // Default accessor functions
         GameObject* GetSingleGameObjectFromStorage(uint32 uiEntry);
-        Creature* GetSingleCreatureFromStorage(uint32 uiEntry, bool bSkipDebugLog = false);
+        Creature* GetSingleCreatureFromStorage(uint32 uiEntry, bool bSkipDebugLog = false) const;
 
         // Change active state of doors or buttons
         void DoUseDoorOrButton(ObjectGuid guid, uint32 uiWithRestoreTime = 0, bool bUseAlternativeState = false);