diff --git a/apps/openmw/mwgui/enchantingdialog.cpp b/apps/openmw/mwgui/enchantingdialog.cpp
index 8353cf99e..7f71716ed 100644
--- a/apps/openmw/mwgui/enchantingdialog.cpp
+++ b/apps/openmw/mwgui/enchantingdialog.cpp
@@ -66,7 +66,9 @@ namespace MWGui
 
         mCharge->setCaption(boost::lexical_cast<std::string>(mEnchanting.getGemCharge()));
 
-        mCastCost->setCaption(boost::lexical_cast<std::string>(mEnchanting.getCastCost()));
+        std::stringstream castCost;
+        castCost << std::setprecision(1) << std::fixed << mEnchanting.getCastCost();
+        mCastCost->setCaption(boost::lexical_cast<std::string>(castCost.str()));
 
         mPrice->setCaption(boost::lexical_cast<std::string>(mEnchanting.getEnchantPrice()));
 
diff --git a/apps/openmw/mwmechanics/enchanting.cpp b/apps/openmw/mwmechanics/enchanting.cpp
index 95d7694dc..821df8fba 100644
--- a/apps/openmw/mwmechanics/enchanting.cpp
+++ b/apps/openmw/mwmechanics/enchanting.cpp
@@ -209,6 +209,9 @@ namespace MWMechanics
 
     float Enchanting::getCastCost() const
     {
+    	if (mCastStyle == ESM::CS_ConstantEffect)
+    		return 0;
+
     	const float enchantCost = getEnchantCost();
     	MWWorld::Ptr player = MWBase::Environment::get().getWorld()->getPlayer().getPlayer();
     	MWMechanics::NpcStats &stats = MWWorld::Class::get(player).getNpcStats(player);