diff --git a/threaddata.cpp b/threaddata.cpp
index 3e21263..43bdb17 100644
--- a/threaddata.cpp
+++ b/threaddata.cpp
@@ -165,7 +165,8 @@ void ThreadData::doKeepAliveCheck()
             }
             else
             {
-                client->resetBuffersIfEligible();
+                if (client)
+                    client->resetBuffersIfEligible();
                 it++;
             }
         }