diff --git a/build.sh b/build.sh
index 10af71840e..0344745a16 100755
--- a/build.sh
+++ b/build.sh
@@ -29,7 +29,7 @@ BUILD_PACKING=false
 BUILD_VARIANT=`get_build_var TARGET_BUILD_VARIANT`
 KERNEL_DTS=""
 BUILD_VERSION=""
-BUILD_JOBS=56
+BUILD_JOBS=`cat /proc/cpuinfo |grep "^processor" |wc -l`
 
 # check pass argument
 while getopts "UCKABpouv:d:V:J:" arg