diff --git a/lib/src/main/java/ua/naiksoftware/stomp/OkHttpConnectionProvider.java b/lib/src/main/java/ua/naiksoftware/stomp/OkHttpConnectionProvider.java
index a7be2e3..c10fc26 100644
--- a/lib/src/main/java/ua/naiksoftware/stomp/OkHttpConnectionProvider.java
+++ b/lib/src/main/java/ua/naiksoftware/stomp/OkHttpConnectionProvider.java
@@ -37,7 +37,9 @@ class OkHttpConnectionProvider extends AbstractConnectionProvider {
     @NonNull
     @Override
     public void rawDisconnect() {
-        openedSocked.close(1000, "");
+        if (openedSocked != null) {
+            openedSocked.close(1000, "");
+        }
     }
 
     @Override