diff --git a/apps/openmw/mwbase/windowmanager.hpp b/apps/openmw/mwbase/windowmanager.hpp
index 069e6311ad..4fce19e337 100644
--- a/apps/openmw/mwbase/windowmanager.hpp
+++ b/apps/openmw/mwbase/windowmanager.hpp
@@ -57,6 +57,12 @@ namespace MWGui
     class InventoryWindow;
     class ContainerWindow;
     class DialogueWindow;
+
+    enum ShowInDialogueMode {
+        ShowInDialogueMode_IfPossible,
+        ShowInDialogueMode_Only,
+        ShowInDialogueMode_Never
+    };
 }
 
 namespace SFO
@@ -226,7 +232,7 @@ namespace MWBase
             virtual void removeDialog(OEngine::GUI::Layout* dialog) = 0;
             ///< Hides dialog and schedules dialog to be deleted.
 
-            virtual void messageBox (const std::string& message, const std::vector<std::string>& buttons = std::vector<std::string>(), bool showInDialogueModeOnly = false) = 0;
+            virtual void messageBox (const std::string& message, const std::vector<std::string>& buttons = std::vector<std::string>(), enum MWGui::ShowInDialogueMode showInDialogueMode = MWGui::ShowInDialogueMode_IfPossible) = 0;
             virtual void staticMessageBox(const std::string& message) = 0;
             virtual void removeStaticMessageBox() = 0;
             virtual int readPressedButton() = 0;
diff --git a/apps/openmw/mwgui/windowmanagerimp.cpp b/apps/openmw/mwgui/windowmanagerimp.cpp
index 878c2b95cd..5448bc3c42 100644
--- a/apps/openmw/mwgui/windowmanagerimp.cpp
+++ b/apps/openmw/mwgui/windowmanagerimp.cpp
@@ -648,19 +648,14 @@ namespace MWGui
         mGarbageDialogs.push_back(dialog);
     }
 
-    void WindowManager::messageBox (const std::string& message, const std::vector<std::string>& buttons, bool showInDialogueModeOnly)
+    void WindowManager::messageBox (const std::string& message, const std::vector<std::string>& buttons, enum MWGui::ShowInDialogueMode showInDialogueMode)
     {
         if (buttons.empty()) {
             /* If there are no buttons, and there is a dialogue window open, messagebox goes to the dialogue window */
-            if (getMode() == GM_Dialogue) {
+            if (getMode() == GM_Dialogue && showInDialogueMode != MWGui::ShowInDialogueMode_Never) {
                 mDialogueWindow->addMessageBox(MyGUI::LanguageManager::getInstance().replaceTags(message));
-            } else {
-                if (showInDialogueModeOnly) {
-                    if (getMode() == GM_Dialogue)
-                        mMessageBoxManager->createMessageBox(message);
-                } else {
-                    mMessageBoxManager->createMessageBox(message);
-                }
+            } else if (showInDialogueMode != MWGui::ShowInDialogueMode_Only) {
+                mMessageBoxManager->createMessageBox(message);
             }
         } else {
             mMessageBoxManager->createInteractiveMessageBox(message, buttons);
diff --git a/apps/openmw/mwgui/windowmanagerimp.hpp b/apps/openmw/mwgui/windowmanagerimp.hpp
index db52d9f79d..dafb65e47b 100644
--- a/apps/openmw/mwgui/windowmanagerimp.hpp
+++ b/apps/openmw/mwgui/windowmanagerimp.hpp
@@ -220,7 +220,7 @@ namespace MWGui
 
     virtual void removeDialog(OEngine::GUI::Layout* dialog); ///< Hides dialog and schedules dialog to be deleted.
 
-    virtual void messageBox (const std::string& message, const std::vector<std::string>& buttons = std::vector<std::string>(), bool showInDialogueModeOnly = false);
+    virtual void messageBox (const std::string& message, const std::vector<std::string>& buttons = std::vector<std::string>(), enum MWGui::ShowInDialogueMode showInDialogueMode = MWGui::ShowInDialogueMode_IfPossible);
     virtual void staticMessageBox(const std::string& message);
     virtual void removeStaticMessageBox();
     virtual int readPressedButton (); ///< returns the index of the pressed button or -1 if no button was pressed (->MessageBoxmanager->InteractiveMessageBox)
diff --git a/apps/openmw/mwmechanics/npcstats.cpp b/apps/openmw/mwmechanics/npcstats.cpp
index e642ffc5a6..63b4467f6d 100644
--- a/apps/openmw/mwmechanics/npcstats.cpp
+++ b/apps/openmw/mwmechanics/npcstats.cpp
@@ -220,16 +220,18 @@ void MWMechanics::NpcStats::increaseSkill(int skillIndex, const ESM::Class &clas
     /// \todo check if character is the player, if levelling is ever implemented for NPCs
     MWBase::Environment::get().getSoundManager ()->playSound ("skillraise", 1, 1);
 
+    std::vector <std::string> noButtons;
+
     std::stringstream message;
     message << boost::format(MWBase::Environment::get().getWindowManager ()->getGameSettingString ("sNotifyMessage39", ""))
                % std::string("#{" + ESM::Skill::sSkillNameIds[skillIndex] + "}")
                % static_cast<int> (base);
-    MWBase::Environment::get().getWindowManager ()->messageBox(message.str());
+    MWBase::Environment::get().getWindowManager ()->messageBox(message.str(), noButtons, MWGui::ShowInDialogueMode_Never);
 
     if (mLevelProgress >= gmst.find("iLevelUpTotal")->getInt())
     {
         // levelup is possible now
-        MWBase::Environment::get().getWindowManager ()->messageBox ("#{sLevelUpMsg}");
+        MWBase::Environment::get().getWindowManager ()->messageBox ("#{sLevelUpMsg}", noButtons, MWGui::ShowInDialogueMode_Never);
     }
 
     getSkill (skillIndex).setBase (base);
diff --git a/apps/openmw/mwscript/containerextensions.cpp b/apps/openmw/mwscript/containerextensions.cpp
index e06505e863..fc21c57122 100644
--- a/apps/openmw/mwscript/containerextensions.cpp
+++ b/apps/openmw/mwscript/containerextensions.cpp
@@ -70,7 +70,7 @@ namespace MWScript
                             msgBox = boost::str(boost::format(msgBox) % count % itemName);
                         }
                         std::vector <std::string> noButtons;
-                        MWBase::Environment::get().getWindowManager()->messageBox(msgBox, noButtons, /*showInDialogueModeOnly*/ true);
+                        MWBase::Environment::get().getWindowManager()->messageBox(msgBox, noButtons, MWGui::ShowInDialogueMode_Only);
                     }
                 }
         };
@@ -142,7 +142,7 @@ namespace MWScript
                             msgBox = boost::str (boost::format(msgBox) % itemName);
                         }
                         std::vector <std::string> noButtons;
-                        MWBase::Environment::get().getWindowManager()->messageBox(msgBox, noButtons, /*showInDialogueModeOnly*/ true);
+                        MWBase::Environment::get().getWindowManager()->messageBox(msgBox, noButtons, MWGui::ShowInDialogueMode_Only);
                     }
                 }
         };