diff --git a/build/mingw/build.bat b/build/mingw/build.bat
index d02751992a..d8340782de 100644
--- a/build/mingw/build.bat
+++ b/build/mingw/build.bat
@@ -5,7 +5,8 @@
 SETLOCAL ENABLEEXTENSIONS
 CD /D %~dp0
 
-SET "JOBS=-j%NUMBER_OF_PROCESSORS%"
+SET /A "JOB_COUNT=(%NUMBER_OF_PROCESSORS% - 1) | 1"
+SET "JOBS=-j%JOB_COUNT%"
 SET "CLANG="
 SET "UCRT="
 SET "COMPILER=x86_64"