diff --git a/src/blackmisc/simulation/fscommon/aircraftmatcher.cpp b/src/blackmisc/simulation/fscommon/aircraftmatcher.cpp
index 94f8bc0de..21d59f681 100644
--- a/src/blackmisc/simulation/fscommon/aircraftmatcher.cpp
+++ b/src/blackmisc/simulation/fscommon/aircraftmatcher.cpp
@@ -149,7 +149,7 @@ namespace BlackMisc
             {
                 InitState e = NotInitialized;
                 InitState d = InitInProgress;
-                if (!m_initState.compare_exchange_weak(e, d)) { return; }
+                if (!m_initState.compare_exchange_strong(e, d)) { return; }
 
                 // sync
                 this->synchronize();