diff --git a/package.json b/package.json
index 14515f0..a0b0ae9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "eventstore-node",
-  "version": "0.0.18",
+  "version": "0.0.19",
   "description": "A port of the EventStore .Net ClientAPI to Node.js",
   "main": "index.js",
   "types": "index.d.ts",
diff --git a/src/core/operationsManager.js b/src/core/operationsManager.js
index 6e2e12d..0c06402 100644
--- a/src/core/operationsManager.js
+++ b/src/core/operationsManager.js
@@ -121,7 +121,7 @@ OperationsManager.prototype.scheduleOperationRetry = function(operation) {
 };
 
 OperationsManager.prototype.removeOperation = function(operation) {
-  this._activeOperations.remove(operation.connectionId);
+  this._activeOperations.remove(operation.correlationId);
   this._logDebug("RemoveOperation SUCCEEDED for %s.", operation);
   this._totalOperationCount = this._activeOperations.length + this._waitingOperations.length;
   return true;