diff --git a/code/ryzom/common/src/game_share/_backup_service_interface_non_module.cpp b/code/ryzom/common/src/game_share/_backup_service_interface_non_module.cpp
index 0fc3df40f..8176793bd 100644
--- a/code/ryzom/common/src/game_share/_backup_service_interface_non_module.cpp
+++ b/code/ryzom/common/src/game_share/_backup_service_interface_non_module.cpp
@@ -85,7 +85,7 @@ private:
 void CGenericRequestIdRegister::pushRequestId(uint32 requestId,const std::string& fileName)
 {
 	// check for out of order entries in the request list
-	BOMB_IF(!_RequestIds.empty() && ((sint32)requestId-(sint32)_RequestIds.back().RequestId)<0,"Ignoring out of order request id in generic callback registration for file "+CSString(fileName).quote(),return);
+	BOMB_IF(!_RequestIds.empty() && (requestId<_RequestIds.back().RequestId),"Ignoring out of order request id in generic callback registration for file "+CSString(fileName).quote(),return);
 
 	// setup a new record for this request id / file name pair
 	SRequestId theNewRequestId;
diff --git a/code/ryzom/common/src/game_share/backup_service_interface.cpp b/code/ryzom/common/src/game_share/backup_service_interface.cpp
index a31656670..112737b6a 100644
--- a/code/ryzom/common/src/game_share/backup_service_interface.cpp
+++ b/code/ryzom/common/src/game_share/backup_service_interface.cpp
@@ -47,10 +47,10 @@ public:
 		for (uint32 i='A'; i<='Z';++i) _Data[i]= true;
 		for (uint32 i='a'; i<='z';++i) _Data[i]= true;
 		for (uint32 i='0'; i<='9';++i) _Data[i]= true;
-		_Data['/']= true;
-		_Data['.']= true;
-		_Data['_']= true;
-		_Data[' ']= true;
+		_Data[(uint32)'/']= true;
+		_Data[(uint32)'.']= true;
+		_Data[(uint32)'_']= true;
+		_Data[(uint32)' ']= true;
 	}
 
 	// lookup a character to determine whether it's valid or not