diff --git a/lib/ConnectionConfig.js b/lib/ConnectionConfig.js
index be7174df7..06f4399c5 100644
--- a/lib/ConnectionConfig.js
+++ b/lib/ConnectionConfig.js
@@ -69,7 +69,7 @@ ConnectionConfig.mergeFlags = function mergeFlags(defaultFlags, userFlags) {
 
   // Merge the new flags
   for (var flag in newFlags) {
-    if (allFlags[flag] !== newFlags[flag]) {
+    if (allFlags[flag] !== false) {
       allFlags[flag] = newFlags[flag];
     }
   }