diff --git a/.appveyor.yml b/.appveyor.yml
index 767ee2a88020a0ef328379503aa8a49c4a6c148a..a06bc8ded6d91eebb600234b4fb762ef8679d0c0 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -15,7 +15,7 @@ install:
 
 build_script:
   - C:\Qt\5.4\msvc2013_opengl\bin\qmake -r CONFIG-=debug_and_release CONFIG+=%CONFIG% CONFIG+=WarningsAsErrorsOn CONFIG+=jombuild qgroundcontrol.pro
-  - jom -j 4
+  - jom
 
 test_script:
   - if "%CONFIG%" EQU "debug" ( debug\qgroundcontrol --unittest )