diff --git a/build/win32/vs10/clutter-build-defines.props b/build/win32/vs10/clutter-build-defines.props
index 8fb7ae6ed..605071b06 100644
--- a/build/win32/vs10/clutter-build-defines.props
+++ b/build/win32/vs10/clutter-build-defines.props
@@ -26,6 +26,8 @@
       <PreprocessorDefinitions>G_DISABLE_SINGLE_INCLUDES;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ForcedIncludeFiles>msvc_recommended_pragmas.h;%(ForcedIncludeFiles)</ForcedIncludeFiles>
       <DisableSpecificWarnings>%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <AdditionalOptions>/d2Zi+ %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <AdditionalDependencies>cogl-pango-1.0.lib;cogl-path-1.0.lib;cogl-1.0.lib;glib-2.0.lib;gobject-2.0.lib;%(AdditionalDependencies)</AdditionalDependencies>
diff --git a/build/win32/vs9/clutter-build-defines.vsprops b/build/win32/vs9/clutter-build-defines.vsprops
index 829161bc8..47b08397b 100644
--- a/build/win32/vs9/clutter-build-defines.vsprops
+++ b/build/win32/vs9/clutter-build-defines.vsprops
@@ -12,6 +12,7 @@
 		AdditionalIncludeDirectories="..\..\..;..\..\..\clutter;$(GlibEtcInstallRoot)\include\cogl-1.0;$(GlibEtcInstallRoot)\include\pango-1.0;$(GlibEtcInstallRoot)\include\atk-1.0;$(GlibEtcInstallRoot)\include\json-glib-1.0;$(GlibEtcInstallRoot)\include;$(GlibEtcInstallRoot)\include\glib-2.0;$(GlibEtcInstallRoot)\lib\glib-2.0\include;$(GlibEtcInstallRoot)\include\cairo;$(GlibEtcInstallRoot)\include"
 		PreprocessorDefinitions="G_DISABLE_SINGLE_INCLUDES"
 		ForcedIncludeFiles="msvc_recommended_pragmas.h"
+		AdditionalOptions="/MP"
 	/>
 	<Tool
 		Name="VCLinkerTool"