diff --git a/Modules/FDD/src/PostProcTask.cxx b/Modules/FDD/src/PostProcTask.cxx
index aba2854773..4eccf02a6f 100644
--- a/Modules/FDD/src/PostProcTask.cxx
+++ b/Modules/FDD/src/PostProcTask.cxx
@@ -201,7 +201,9 @@ void PostProcTask::initialize(Trigger, framework::ServiceRegistryRef services)
 
   for (int i = 0; i < getObjectsManager()->getNumberPublishedObjects(); i++) {
     TH1* obj = dynamic_cast<TH1*>(getObjectsManager()->getMonitorObject(i)->getObject());
-    obj->SetTitle((string("FDD ") + obj->GetTitle()).c_str());
+    if (obj != nullptr) {
+      obj->SetTitle((string("FDD ") + obj->GetTitle()).c_str());
+    }
   }
 }
 
diff --git a/Modules/FT0/src/PostProcTask.cxx b/Modules/FT0/src/PostProcTask.cxx
index f62b07d351..b401ea9a8a 100644
--- a/Modules/FT0/src/PostProcTask.cxx
+++ b/Modules/FT0/src/PostProcTask.cxx
@@ -201,7 +201,9 @@ void PostProcTask::initialize(Trigger, framework::ServiceRegistryRef services)
 
   for (int i = 0; i < getObjectsManager()->getNumberPublishedObjects(); i++) {
     TH1* obj = dynamic_cast<TH1*>(getObjectsManager()->getMonitorObject(i)->getObject());
-    obj->SetTitle((string("FT0 ") + obj->GetTitle()).c_str());
+    if (obj != nullptr) {
+      obj->SetTitle((string("FT0 ") + obj->GetTitle()).c_str());
+    }
   }
 }
 
diff --git a/Modules/FV0/src/PostProcTask.cxx b/Modules/FV0/src/PostProcTask.cxx
index 41ee9ff770..8d426fe619 100644
--- a/Modules/FV0/src/PostProcTask.cxx
+++ b/Modules/FV0/src/PostProcTask.cxx
@@ -201,7 +201,9 @@ void PostProcTask::initialize(Trigger, framework::ServiceRegistryRef services)
 
   for (int i = 0; i < getObjectsManager()->getNumberPublishedObjects(); i++) {
     TH1* obj = dynamic_cast<TH1*>(getObjectsManager()->getMonitorObject(i)->getObject());
-    obj->SetTitle((string("FV0 ") + obj->GetTitle()).c_str());
+    if (obj != nullptr) {
+      obj->SetTitle((string("FV0 ") + obj->GetTitle()).c_str());
+    }
   }
 }