diff --git a/psrdada_cpp/effelsberg/edd/detail/GatedSpectrometer.cu b/psrdada_cpp/effelsberg/edd/detail/GatedSpectrometer.cu
index 1540b1af76d01c62e7197f11be9603f357a876c2..f32326097a9100ec512b4d7b43c75485814cf52c 100644
--- a/psrdada_cpp/effelsberg/edd/detail/GatedSpectrometer.cu
+++ b/psrdada_cpp/effelsberg/edd/detail/GatedSpectrometer.cu
@@ -372,7 +372,7 @@ void GatedSpectrometer<HandlerType, InputType, OutputType>::process(SinglePolari
             thrust::raw_pointer_cast(outputDataStream->G0.data.a().data()),
             _nchans,
             inputDataStream->_channelised_voltage_G0.size(),
-            _naccumulate,
+            _naccumulate / _nBlocks,
             1, 0., 1, 0);
 
   kernels::detect_and_accumulate<IntegratedPowerType> <<<1024, 1024, 0, _proc_stream>>>(
@@ -380,7 +380,7 @@ void GatedSpectrometer<HandlerType, InputType, OutputType>::process(SinglePolari
             thrust::raw_pointer_cast(outputDataStream->G1.data.a().data()),
             _nchans,
             inputDataStream->_channelised_voltage_G1.size(),
-            _naccumulate,
+            _naccumulate / _nBlocks,
             1, 0., 1, 0);
 
     // count saturated samples