diff --git a/appveyor.yml b/appveyor.yml
index 212d933..6712a59 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -36,7 +36,7 @@ init:
   - set TEST_HOME=nrtestsuite
   - set NRTEST_SCRIPT=C:\Python27\Scripts
   - if "%ARCH%"=="Win64" (set VS_ARCH=Win64)
-  - set GENERATOR="Visual Studio %VS_VERSION%%VS_ARCH%"
+  - set GENERATOR="Visual Studio %VS_VERSION% %VS_ARCH%"
   # See values set
   - echo %APPVEYOR_BUILD_WORKER_IMAGE%
   - echo %ARCH%