diff --git a/code/ryzom/client/src/client_sheets/client_sheets.vcproj b/code/ryzom/client/src/client_sheets/client_sheets.vcproj
index 7a398da71..46037a090 100644
--- a/code/ryzom/client/src/client_sheets/client_sheets.vcproj
+++ b/code/ryzom/client/src/client_sheets/client_sheets.vcproj
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="Windows-1252"?>
 <VisualStudioProject
 	ProjectType="Visual C++"
-	Version="9.00"
+	Version="9,00"
 	Name="client_sheets"
 	ProjectGUID="{296D8FB5-DB32-48DD-A6AF-10A77A5DEE70}"
 	RootNamespace="client_sheets"
@@ -180,7 +180,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
-				Optimization="3"
+				Optimization="4"
 				InlineFunctionExpansion="2"
 				EnableIntrinsicFunctions="true"
 				FavorSizeOrSpeed="1"
@@ -252,7 +252,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
-				Optimization="3"
+				Optimization="4"
 				InlineFunctionExpansion="2"
 				EnableIntrinsicFunctions="true"
 				FavorSizeOrSpeed="1"