diff --git a/appveyor.yml b/appveyor.yml
index a954b43..fb66b6d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,7 +13,7 @@ environment:
   - arch: Win64
 
 before_build:
-- cmd: cmake -G "Visual Studio 15 2017Win64"   
+- cmd: cmake -G "Visual Studio 15 2017 Win64"   
 
 build:
   project: c:\projects\tic-80\template.sln