diff --git a/appveyor.yml b/appveyor.yml
index 6712a59..2b34713 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -35,7 +35,7 @@ init:
   - set BUILD_HOME=buildprod
   - set TEST_HOME=nrtestsuite
   - set NRTEST_SCRIPT=C:\Python27\Scripts
-  - if "%ARCH%"=="Win64" (set VS_ARCH=Win64)
+  - if "%ARCH%"=="Win64" (set VS_ARCH= Win64)
   - set GENERATOR="Visual Studio %VS_VERSION% %VS_ARCH%"
   # See values set
   - echo %APPVEYOR_BUILD_WORKER_IMAGE%