diff --git a/code/ryzom/server/src/ai_service/sheets.cpp b/code/ryzom/server/src/ai_service/sheets.cpp
index e15ca327f..56060db1e 100644
--- a/code/ryzom/server/src/ai_service/sheets.cpp
+++ b/code/ryzom/server/src/ai_service/sheets.cpp
@@ -971,8 +971,7 @@ uint32 AISHEETS::CSheets::getGroupPropertiesIndex(const std::string &groupIndexN
 	if (groupIndexName.empty())
 		return	std::numeric_limits<uint32>::max();
 	
-	NLMISC::strupr(groupIndexName);
-	std::map<string, uint32>::iterator it = _NameToGroupIndex.find(groupIndexName);
+	std::map<string, uint32>::iterator it = _NameToGroupIndex.find(NLMISC::toUpper(groupIndexName));
 	if (it==_NameToGroupIndex.end())
 	{
 		uint32 groupIndex = (uint32)_NameToGroupIndex.size();
diff --git a/code/ryzom/server/src/ai_service/sheets.h b/code/ryzom/server/src/ai_service/sheets.h
index efa4d0c10..121f49c7a 100644
--- a/code/ryzom/server/src/ai_service/sheets.h
+++ b/code/ryzom/server/src/ai_service/sheets.h
@@ -703,7 +703,7 @@ public:
 	IAIActionCPtr		lookupAction	(NLMISC::CSheetId const& id);
 	IRaceStatsCPtr		lookupRaceStats	(NLMISC::CSheetId const& id);
 	
-	uint32	getGroupPropertiesIndex(std::string	groupIndexName);
+	uint32	getGroupPropertiesIndex(const std::string &groupIndexName);
 	
 	uint32 playerGroupIndex() { return _PlayerGroupIndex; }