diff --git a/slsReceiverSoftware/src/Implementation.cpp b/slsReceiverSoftware/src/Implementation.cpp
index 8597f8d43..de13dc086 100644
--- a/slsReceiverSoftware/src/Implementation.cpp
+++ b/slsReceiverSoftware/src/Implementation.cpp
@@ -462,13 +462,12 @@ double Implementation::getProgress() const {
     uint64_t currentFrameIndex = -1;
     uint32_t flagsum = 0;
 
-    for (const auto &it : dataProcessor) {
+    for (const auto &it : listener) {
         flagsum += it->GetStartedFlag();
-        currentFrameIndex =
-            std::min(currentFrameIndex, it->GetProcessedIndex());
+        currentFrameIndex = std::max(currentFrameIndex, it->GetListenedIndex());
     }
     // no data processed
-    if (flagsum != dataProcessor.size()) {
+    if (flagsum != listener.size()) {
         currentFrameIndex = -1;
     }
 
diff --git a/slsReceiverSoftware/src/Listener.cpp b/slsReceiverSoftware/src/Listener.cpp
index 7bbab2ab0..5902de4de 100644
--- a/slsReceiverSoftware/src/Listener.cpp
+++ b/slsReceiverSoftware/src/Listener.cpp
@@ -57,6 +57,10 @@ bool Listener::GetStartedFlag() { return startedFlag; }
 
 uint64_t Listener::GetCurrentFrameIndex() { return currentFrameIndex; }
 
+uint64_t Listener::GetListenedIndex() {
+    return currentFrameIndex_ - firstIndex_;
+}
+
 void Listener::SetFifo(Fifo *f) { fifo = f; }
 
 void Listener::ResetParametersforNewAcquisition() {
diff --git a/slsReceiverSoftware/src/Listener.h b/slsReceiverSoftware/src/Listener.h
index d5eb01a68..9a02449b3 100644
--- a/slsReceiverSoftware/src/Listener.h
+++ b/slsReceiverSoftware/src/Listener.h
@@ -70,6 +70,8 @@ class Listener : private virtual slsDetectorDefs, public ThreadObject {
     bool GetStartedFlag();
 
     uint64_t GetCurrentFrameIndex();
+    /** (-1 if no frames have been caught) */
+    uint64_t GetListenedIndex();
 
     /**
      * Set Fifo pointer to the one given