diff --git a/openwrtbuilder b/openwrtbuilder
index d5df2eb..89bf0b3 100755
--- a/openwrtbuilder
+++ b/openwrtbuilder
@@ -669,6 +669,7 @@ fromSource() {
 
     # Make image
     (( DEBUG )) && make_opts+=("V=s")
+    make_opts+=("-j$(($(nproc) - 2))")
     execute make "${make_opts[@]}" defconfig download clean world
 
     popd || return 1