diff --git a/indexdir.lua b/indexdir.lua
index 82bbcf8..b3264a6 100644
--- a/indexdir.lua
+++ b/indexdir.lua
@@ -11,7 +11,7 @@ function paths.indexdir(pathList, extensionList, use_cache, ignorePattern)
    local wc = 'wc'
    local cut = 'cut'
    local find = 'find'
-   if jit.os == 'OSX' then
+   if jit and jit.os == 'OSX' then
       wc = 'gwc'
       cut = 'gcut'
       find = 'gfind'