diff --git a/appveyor.yml b/appveyor.yml
index 57d8c5ce..47f3317d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -81,7 +81,7 @@ matrix:
     - MINGW_VERSION: 8.1.0
       platform: x86
     # Get rid of Visual Studio 2015 builds (unsupported)
-    - SOL_NO_2015: 1
+    - SOL2_NO_2015: 1
     - platform: x86
       SOL2_LUA_VERSION: 5.2.4
     - platform: x86