diff --git a/cli/cppcheck.vcproj b/cli/cppcheck.vcproj
index a3b8c656d..3e8bdb1d5 100755
--- a/cli/cppcheck.vcproj
+++ b/cli/cppcheck.vcproj
@@ -127,6 +127,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				WholeProgramOptimization="true"
diff --git a/cli/cppcheck.vcxproj b/cli/cppcheck.vcxproj
index 0a41f0ecc..9bdf95800 100644
--- a/cli/cppcheck.vcxproj
+++ b/cli/cppcheck.vcxproj
@@ -105,6 +105,7 @@
       <WarningLevel>Level4</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <EnablePREfast>false</EnablePREfast>
+      <AdditionalOptions>/MP %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;WIN32;%(PreprocessorDefinitions)</PreprocessorDefinitions>
diff --git a/lib/lib.vcproj b/lib/lib.vcproj
index 542ad7fff..e5cca8ae8 100644
--- a/lib/lib.vcproj
+++ b/lib/lib.vcproj
@@ -104,6 +104,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				WholeProgramOptimization="true"
diff --git a/lib/lib.vcxproj b/lib/lib.vcxproj
index 03d95f096..3fdc0d872 100644
--- a/lib/lib.vcxproj
+++ b/lib/lib.vcxproj
@@ -76,6 +76,7 @@
       <ProgramDataBaseFileName>$(IntDir)</ProgramDataBaseFileName>
       <WarningLevel>Level4</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <AdditionalOptions>/MP %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;WIN32;%(PreprocessorDefinitions)</PreprocessorDefinitions>
diff --git a/test/test.vcproj b/test/test.vcproj
index 4e58c4e1b..edf3631f5 100755
--- a/test/test.vcproj
+++ b/test/test.vcproj
@@ -4,6 +4,7 @@
 	Version="9.00"
 	Name="test"
 	ProjectGUID="{BA98E531-D8B3-39CB-8171-064854404B81}"
+	RootNamespace="test"
 	Keyword="Qt4VSv1.0"
 	TargetFrameworkVersion="0"
 	>
@@ -125,6 +126,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				WholeProgramOptimization="true"
diff --git a/test/test.vcxproj b/test/test.vcxproj
index 9b5a95775..e603289fb 100644
--- a/test/test.vcxproj
+++ b/test/test.vcxproj
@@ -102,6 +102,7 @@
       <ProgramDataBaseFileName>$(IntDir)</ProgramDataBaseFileName>
       <WarningLevel>Level4</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <AdditionalOptions>/MP %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>QT_NO_DEBUG;NDEBUG;UNICODE;WIN32;QT_LARGEFILE_SUPPORT;UNIT_TESTING;%(PreprocessorDefinitions)</PreprocessorDefinitions>