diff --git a/build.vc11/lib_speed/lib_speed.vcxproj b/build.vc11/lib_speed/lib_speed.vcxproj
index b3b90cee..8a909791 100644
--- a/build.vc11/lib_speed/lib_speed.vcxproj
+++ b/build.vc11/lib_speed/lib_speed.vcxproj
@@ -86,6 +86,7 @@
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
       <AdditionalIncludeDirectories>$(MPDIR);..\..\lib\$(intDir);.\;..\;..\..\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Lib>
       <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -104,6 +105,7 @@
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <AdditionalIncludeDirectories>$(MPDIR);..\..\lib\$(intDir);.\;..\;..\..\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Lib>
       <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -119,6 +121,7 @@
       <WarningLevel>Level3</WarningLevel>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <AdditionalIncludeDirectories>$(MPDIR);..\..\lib\$(intDir);.\;..\;..\..\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Lib>
       <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -138,6 +141,7 @@
       <AdditionalIncludeDirectories>$(MPDIR);..\..\lib\$(intDir);.\;..\;..\..\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <BufferSecurityCheck>false</BufferSecurityCheck>
       <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Lib>
       <AdditionalDependencies>psapi.lib;%(AdditionalDependencies)</AdditionalDependencies>