diff --git a/src/protocols/SessionLock.cpp b/src/protocols/SessionLock.cpp
index e7abc7cb..42df5fd6 100644
--- a/src/protocols/SessionLock.cpp
+++ b/src/protocols/SessionLock.cpp
@@ -177,7 +177,7 @@ void CSessionLockProtocol::onLock(CExtSessionLockManagerV1* pMgr, uint32_t id) {
         return;
     }
 
-    if (m_vLocks.size() > 1) {
+    if (locked) {
         LOGM(ERR, "Tried to lock a locked session");
         RESOURCE->inert = true;
         RESOURCE->resource->sendFinished();