diff --git a/appveyor.yml b/appveyor.yml
index 6428c40c0..6bf4c35e7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -35,7 +35,7 @@ before_build:
   - ps: Import-Module .\build\psake.psm1
 
 build_script:
-  - ps: Invoke-Psake .\build\build.ps1 -properties @{"BuildNumber"=$env:APPVEYOR_BUILD_NUMBER;"AppVeyor"=$env:APPVEYOR;CoverallsRepoToken$env:COVERALLS_REPO_TOKEN}
+  - ps: Invoke-Psake .\build\build.ps1 -properties @{"BuildNumber"=$env:APPVEYOR_BUILD_NUMBER;"AppVeyor"=$env:APPVEYOR;"CoverallsRepoToken"=$env:COVERALLS_REPO_TOKEN}
 
 #---------------------------------#
 #       tests configuration       #