diff --git a/src/ZoneWriting/Writing/Processor/OutputProcessorXChunks.cpp b/src/ZoneWriting/Writing/Processor/OutputProcessorXChunks.cpp
index 5dd0d689..4bf265a6 100644
--- a/src/ZoneWriting/Writing/Processor/OutputProcessorXChunks.cpp
+++ b/src/ZoneWriting/Writing/Processor/OutputProcessorXChunks.cpp
@@ -53,6 +53,7 @@ void OutputProcessorXChunks::WriteChunk()
     }
 
     m_current_stream = (m_current_stream + 1) % m_stream_count;
+    m_input_size = 0;
 }
 
 OutputProcessorXChunks::OutputProcessorXChunks(const int numStreams, const size_t xChunkSize, const size_t xChunkWriteSize)