diff --git a/build-kernel.sh b/build-kernel.sh
index d3d00671e..a498288cf 100755
--- a/build-kernel.sh
+++ b/build-kernel.sh
@@ -182,7 +182,7 @@ if [ "$RV1106" == "1" ]; then
         export CROSS_COMPILE=arm-linux-gnueabi-
     fi
     make ARCH=arm LOCALVERSION= $cfg
-    make ARCH=arm LOCALVERSION= -j8
+    make ARCH=arm LOCALVERSION= -j$(($(nproc) - 2))
     cp arch/arm/boot/zImage vmlinuz
     for dtb_f in $dtb
     do
@@ -198,8 +198,8 @@ if [ "$RV1106" == "1" ]; then
     mkdir -p out/extlinux
 else
     make ARCH=arm64 LOCALVERSION= $cfg
-    make ARCH=arm64 LOCALVERSION= -j8
-    make ARCH=arm64 LOCALVERSION= modules -j8
+    make ARCH=arm64 LOCALVERSION= -j$(($(nproc) - 2))
+    make ARCH=arm64 LOCALVERSION= modules -j$(($(nproc) - 2))
     cp arch/arm64/boot/Image.gz vmlinuz
     cp arch/arm64/boot/Image Image
     for dtb_f in $dtb