diff --git a/build.cmd b/build.cmd
index 586e6e9..20df913 100644
--- a/build.cmd
+++ b/build.cmd
@@ -3,7 +3,7 @@
 call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\Tools\VsDevCmd.bat" -arch=amd64 -host_arch=amd64
 cd /d "%~dp0"
 
-set CL=/nologo /errorReport:none /Gm- /GF /GS- /MT /W4 /WX /wd4324 /D_CRT_SECURE_NO_DEPRECATE
+set CL=/nologo /errorReport:none /Gm- /GF /GS- /MP /MT /W4 /WX /wd4324 /D_CRT_SECURE_NO_DEPRECATE
 set LINK=/errorReport:none /INCREMENTAL:NO
 
 set CL=%CL% /Ox