diff --git a/code/ryzom/server/src/entities_game_service/mission_manager/mission_step_template.cpp b/code/ryzom/server/src/entities_game_service/mission_manager/mission_step_template.cpp
index a042da852..179bea350 100644
--- a/code/ryzom/server/src/entities_game_service/mission_manager/mission_step_template.cpp
+++ b/code/ryzom/server/src/entities_game_service/mission_manager/mission_step_template.cpp
@@ -104,7 +104,7 @@ uint32 IMissionStepTemplate::sendRpStepText(CCharacter * user,const std::vector<
 
 	_User = user;
 
-	if (_RoleplayText.substr(0, 6) == "WEBIG_")
+	if (_RoleplayText.compare(0, 6, "WEBIG_") == 0)
 	{
 		TVectorParamCheck params;
 		string name = _RoleplayText;
@@ -174,7 +174,7 @@ uint32 IMissionStepTemplate::sendStepText(CCharacter * user,const std::vector<ui
 	// If the text is overriden, add the overide parameters
 	if ( !_OverridenText.empty() )
 	{
-		if (_OverridenText.substr(0, 6) == "WEBIG_")
+		if (_OverridenText.compare(0, 6, "WEBIG_") == 0)
 		{
 			string text = _OverridenText;
 			if (user)
diff --git a/code/ryzom/server/src/entities_game_service/mission_manager/mission_template.cpp b/code/ryzom/server/src/entities_game_service/mission_manager/mission_template.cpp
index ffcbc1e61..d8c9e4694 100644
--- a/code/ryzom/server/src/entities_game_service/mission_manager/mission_template.cpp
+++ b/code/ryzom/server/src/entities_game_service/mission_manager/mission_template.cpp
@@ -2441,7 +2441,7 @@ uint32 CMissionTemplate::testPrerequisits( CCharacter * user, CPrerequisitInfos
 
 uint32 CMissionTemplate::sendTitleText( const TDataSetRow & userRow, const TDataSetRow & giver ) const
 {
-	if (TitleText.substr(0, 6) == "WEBIG_")
+	if (TitleText.compare(0, 6, "WEBIG_") == 0)
 	{
 		string text = TitleText;
 		CCharacter *user = PlayerManager.getChar(getEntityIdFromRow(userRow));
@@ -2469,7 +2469,7 @@ uint32 CMissionTemplate::sendTitleText( const TDataSetRow & userRow, const TData
 
 uint32 CMissionTemplate::sendAutoText( const TDataSetRow & userRow,const NLMISC::CEntityId & giver) const
 {
-	if (AutoText.substr(0, 6) == "WEBIG_")
+	if (AutoText.compare(0, 6, "WEBIG_") == 0)
 	{
 		string text = AutoText;
 		CCharacter *user = PlayerManager.getChar(getEntityIdFromRow(userRow));
@@ -2494,7 +2494,7 @@ uint32 CMissionTemplate::sendAutoText( const TDataSetRow & userRow,const NLMISC:
 
 uint32 CMissionTemplate::sendDescText( const TDataSetRow & userRow, const TDataSetRow & giver, uint32 descIndex) const
 {
-	if (DescText.substr(0, 6) == "WEBIG_")
+	if (DescText.compare(0, 6, "WEBIG_") == 0)
 	{
 		string text = DescText;
 		CCharacter *user = PlayerManager.getChar(getEntityIdFromRow(userRow));