diff --git a/Sandboxie/apps/common/Common.vcxproj b/Sandboxie/apps/common/Common.vcxproj
index 698d8efc..c7680231 100644
--- a/Sandboxie/apps/common/Common.vcxproj
+++ b/Sandboxie/apps/common/Common.vcxproj
@@ -67,6 +67,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='SbieDebug|Win32'">
     <ClCompile>
       <ExceptionHandling>Sync</ExceptionHandling>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Lib>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
@@ -75,6 +76,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='SbieRelease|Win32'">
     <ClCompile>
       <ExceptionHandling>Sync</ExceptionHandling>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Lib>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
@@ -83,6 +85,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='SbieDebug|x64'">
     <ClCompile>
       <ExceptionHandling>Sync</ExceptionHandling>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Lib>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
@@ -91,6 +94,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='SbieRelease|x64'">
     <ClCompile>
       <ExceptionHandling>Sync</ExceptionHandling>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <Lib>
       <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>