diff --git a/DataFormats/Detectors/CTP/include/DataFormatsCTP/Configuration.h b/DataFormats/Detectors/CTP/include/DataFormatsCTP/Configuration.h
index e9464089d71fc..ff1462084d53d 100644
--- a/DataFormats/Detectors/CTP/include/DataFormatsCTP/Configuration.h
+++ b/DataFormats/Detectors/CTP/include/DataFormatsCTP/Configuration.h
@@ -214,7 +214,8 @@ struct CtpCfg {
   uint32_t orbitShift = 0;
   uint32_t irInputs_1_24 = 0;
   uint32_t irInputs_25_48 = 0;
-  ClassDefNV(CtpCfg, 1)
+  std::vector<int> listOfUsedInputs();
+  ClassDefNV(CtpCfg, 2)
 };
 } // namespace ctp
 } // namespace o2
diff --git a/DataFormats/Detectors/CTP/src/Configuration.cxx b/DataFormats/Detectors/CTP/src/Configuration.cxx
index 61e51bcb20d91..98458ef06d1d3 100644
--- a/DataFormats/Detectors/CTP/src/Configuration.cxx
+++ b/DataFormats/Detectors/CTP/src/Configuration.cxx
@@ -1227,9 +1227,24 @@ int CtpCfg::readAndSave(std::string& path)
   }
   return 0;
 }
-
+std::vector<int> CtpCfg::listOfUsedInputs()
+{
+  std::cout << std::hex << "0x" << irInputs_1_24 << " " << irInputs_25_48 << std::dec << std::endl;
+  std::vector<int> inputList;
+  for (int i = 0; i < 24; i++) {
+    if ((1ul << i) & irInputs_1_24) {
+      inputList.push_back(i);
+    }
+  }
+  for (int i = 0; i < 24; i++) {
+    if ((1ul << i) & irInputs_25_48) {
+      inputList.push_back(i + 24);
+    }
+  }
+  return inputList;
+}
 std::ostream& o2::ctp::operator<<(std::ostream& in, const o2::ctp::CTPConfiguration& conf)
 {
   conf.printStream(in);
   return in;
-}
+}
\ No newline at end of file