diff --git a/src/groups/mqb/mqba/mqba_domainmanager.cpp b/src/groups/mqb/mqba/mqba_domainmanager.cpp
index f44026aab2..f59930cbb7 100644
--- a/src/groups/mqb/mqba/mqba_domainmanager.cpp
+++ b/src/groups/mqb/mqba/mqba_domainmanager.cpp
@@ -719,6 +719,8 @@ void DomainManager::createDomain(
     const bsl::string&                         name,
     const mqbi::DomainFactory::CreateDomainCb& callback)
 {
+    // executed by *ANY* thread
+
     if (!d_isStarted) {
         BALL_LOG_INFO << "Not creating domain [" << name << "] at this time "
                       << "because self is stopping.";
diff --git a/src/groups/mqb/mqba/mqba_domainmanager.h b/src/groups/mqb/mqba/mqba_domainmanager.h
index d1038eed93..db731253b5 100644
--- a/src/groups/mqb/mqba/mqba_domainmanager.h
+++ b/src/groups/mqb/mqba/mqba_domainmanager.h
@@ -33,7 +33,6 @@
 // This component is thread safe.
 
 // MQB
-
 #include <mqbconfm_messages.h>
 #include <mqbi_domain.h>
 
@@ -65,9 +64,6 @@ namespace BloombergLP {
 namespace bslmt {
 class Latch;
 }
-namespace bsls {
-class AtomicInt;
-}
 namespace mqbblp {
 class ClusterCatalog;
 }
@@ -189,7 +185,7 @@ class DomainManager BSLS_CPP11_FINAL : public mqbi::DomainFactory {
     DomainSpMap d_domains;
     // Map of domains
 
-    bool d_isStarted;
+    bsls::AtomicBool d_isStarted;
     // Is the domain manager started
 
     bslma::Allocator* d_allocator_p;