diff --git a/make_libs.bat b/make_libs.bat
index 6c56dbd..dd57e1a 100644
--- a/make_libs.bat
+++ b/make_libs.bat
@@ -3,4 +3,4 @@ set ARCH=%~1
 set PATH=%SDK_MINGW_DIR%%ARCH%\bin;%SDK_QT4_DIR%%ARCH%\bin;%SDK_CMAKE_DIR%\bin
 if defined SDK_QT5_DIR set Qt5_DIR=%SDK_QT5_DIR%%ARCH%
 mkdir ..\libs_build_win%ARCH%
-cd ../libs_build_win%ARCH% && cmake_mgw -Wno-dev -DQGLVIEW=1 ../libs && make install -j16 && cd ../libs && pause
+cd ../libs_build_win%ARCH% && cmake_mgw -Wno-dev -DQGLVIEW=1 ../libs && make install -j4 && cd ../libs && pause
diff --git a/make_libs_all.bat b/make_libs_all.bat
index b7ce807..b6bd18b 100644
--- a/make_libs_all.bat
+++ b/make_libs_all.bat
@@ -1,2 +1,2 @@
-:start cmd /C make_libs32.bat
+start cmd /C make_libs32.bat
 start cmd /C make_libs64.bat