diff --git a/stepmania/src/ThemeManager.cpp b/stepmania/src/ThemeManager.cpp
index c055d47767..c339b29f8a 100644
--- a/stepmania/src/ThemeManager.cpp
+++ b/stepmania/src/ThemeManager.cpp
@@ -284,7 +284,7 @@ static void MergeIniUnder( XNode *pFrom, XNode *pTo )
 			FOREACHM( RString, XNodeValue *, pSectionNode->m_attrs, it2 )
 			{
 				/* Don't overwrite existing nodes. */
-				pChildNode->AppendAttr( it2->first, it2->second, false );
+				pChildNode->AppendAttr( it2->first, new XNodeValue(*it2->second), false );
 			}
 		}