1 files changed, 3 insertions, 0 deletions

diff --git a/.appveyor/install.bat b/.appveyor/install.bat
index db4800f9..a2aefdd2 100644
--- a/.appveyor/install.bat
+++ b/.appveyor/install.bat
@@ -15,6 +15,9 @@ if "%LUA_VER%" NEQ "" (
         set LUA_SHORTV=5.1
 )
 
+:: unless we specify a platform on appveyor.yaml, we won't get this variable
+if not defined platform set platform=x86
+
 :: defines LUA_DIR so Cmake can find this Lua install
 if "%LUA%"=="luajit" (
         set LUA_DIR=c:\lua\%platform%\lj%LJ_SHORTV%