diff --git a/windows/build.ps1 b/windows/build.ps1
index 52a1d669..ff43d8b8 100644
--- a/windows/build.ps1
+++ b/windows/build.ps1
@@ -183,6 +183,7 @@ try {
 	    -DBUILD_SHARED_LIBS="${SHARED}" `
 	    -DCMAKE_C_FLAGS_DEBUG="${CFLAGS_DEBUG}" `
 	    -DCMAKE_C_FLAGS_RELEASE="${CFLAGS_RELEASE}" `
+	    -DCMAKE_MSVC_RUNTIME_LIBRARY="${CMAKE_MSVC_RUNTIME_LIBRARY}" `
 	    -DCMAKE_INSTALL_PREFIX="${PREFIX}" "${CMAKE_SYSTEM_VERSION}"; `
 	    ExitOnError
 	& $CMake --build . --config ${Config} --verbose; ExitOnError
diff --git a/windows/const.ps1 b/windows/const.ps1
index 41092268..03ea34d2 100644
--- a/windows/const.ps1
+++ b/windows/const.ps1
@@ -34,9 +34,13 @@ New-Variable -Name 'PREFIX' -Value "${OUTPUT}\${Arch}\${Type}" -Option Constant
 if ("${Type}" -eq "dynamic") {
 	New-Variable -Name 'RUNTIME' -Value '/MD' -Option Constant
 	New-Variable -Name 'SHARED' -Value 'ON' -Option Constant
+	New-Variable -Name 'CMAKE_MSVC_RUNTIME_LIBRARY' -Option Constant `
+	    -Value 'MultiThreaded$<$<CONFIG:Debug>:Debug>DLL'
 } else {
 	New-Variable -Name 'RUNTIME' -Value '/MT' -Option Constant
 	New-Variable -Name 'SHARED' -Value 'OFF' -Option Constant
+	New-Variable -Name 'CMAKE_MSVC_RUNTIME_LIBRARY' -Option Constant `
+	    -Value 'MultiThreaded$<$<CONFIG:Debug>:Debug>'
 }
 New-Variable -Name 'CFLAGS_DEBUG' -Value "${RUNTIME}d /Zi /guard:cf /sdl" `
     -Option Constant