diff --git a/lib/node.js b/lib/node.js
index e512905..b93a440 100644
--- a/lib/node.js
+++ b/lib/node.js
@@ -138,7 +138,7 @@ Node.prototype.connect = function() {
 
 Node.prototype.incrOpcounter = function(count, done) {
   // Master-only operation
-  if (this.role != 'master') {
+  if (this.role != 'master' || this.options.single_mode) {
     return;
   }
   if (typeof count == 'function') {