diff --git a/src/classes/PRunBase.cpp b/src/classes/PRunBase.cpp
index ece1090cd..4b483aaab 100644
--- a/src/classes/PRunBase.cpp
+++ b/src/classes/PRunBase.cpp
@@ -172,8 +172,10 @@ void PRunBase::DeadTimeCorrection(std::vector<PDoubleVector> &histos, PUIntVecto
 {
   PRawRunData* runData = fRawData->GetRunData(*fRunInfo->GetRunName());
 
-  if (!runData->DeadTimeCorrectionReady())
+  if (!runData->DeadTimeCorrectionReady()) {
+    std::cerr << std::endl << "**WARNING** PRunBase::DeadTimeCorrection: missing input for dead time correction" << std::endl;
     return;
+  }
 
 
   // check if a dead time correction has to be done