diff --git a/appveyor.yml b/appveyor.yml
index fd9ee8b6c..236ee15de 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -147,7 +147,7 @@ before_build:
 build_script:
   - cd build
   - if "%DEPLOY%" == "true" (qmake ..\Valentina.pro -r CONFIG+=no_ccache CONFIG+=checkWarnings) else (qmake ..\Valentina.pro -r CONFIG+=noDebugSymbols CONFIG+=no_ccache CONFIG+=checkWarnings)
-  - if not "%QMAKE_GENERATOR%" == "MinGW Makefiles" (nmake -s) else (mingw32-make -j%NUMBER_OF_PROCESSORS%)
+  - if not "%QMAKE_GENERATOR%" == "MinGW Makefiles" (nmake -s) else (mingw32-make)
 
 # to run your custom scripts instead of automatic tests
 test_script: