diff --git a/src/util/order_cache.hpp b/src/util/order_cache.hpp
index d971437e..1c9659f4 100644
--- a/src/util/order_cache.hpp
+++ b/src/util/order_cache.hpp
@@ -47,7 +47,7 @@ struct OrderCache<T>::CompareValues {
 	CompareValues(const vector<String>& values) : values(values) {}
 	
 	inline bool operator () (const KV& a, const KV& b) {
-		return values[a.second] < values[b.second];
+		return smart_less(values[a.second], values[b.second]);
 	}
 };
 
diff --git a/src/util/string.cpp b/src/util/string.cpp
index bfac4869..310e02f0 100644
--- a/src/util/string.cpp
+++ b/src/util/string.cpp
@@ -221,6 +221,7 @@ bool smart_less(const String& as, const String& bs) {
 			return lt;
 		} else {
 			// compare characters
+			// TODO: decompose characters, in particular AE and accents
 			Char la = toLower(a), lb = toLower(b);
 			if (la < lb) return true;
 			if (la > lb) return false;