diff --git a/index.js b/index.js
index 8867894cd..b26ec277a 100755
--- a/index.js
+++ b/index.js
@@ -2,7 +2,7 @@
 
 // increase the libuv threadpool size to 1.5x the number of logical CPUs.
 process.env.UV_THREADPOOL_SIZE = Math.ceil(Math.max(4, require('os').cpus().length * 1.5));
-//process.env.OPENFILEGDB_IN_MEMORY_SPI = "OFF";
+process.env.OPENFILEGDB_IN_MEMORY_SPI = "OFF";
 
 var fs = require('fs');
 var path = require('path');