diff --git a/source/blender/compositor/intern/COM_ExecutionGroup.cpp b/source/blender/compositor/intern/COM_ExecutionGroup.cpp
index 025ed76907d..74c1128a37e 100644
--- a/source/blender/compositor/intern/COM_ExecutionGroup.cpp
+++ b/source/blender/compositor/intern/COM_ExecutionGroup.cpp
@@ -384,7 +384,7 @@ void ExecutionGroup::finalizeChunkExecution(int chunkNumber, MemoryBuffer **memo
 	if (this->m_chunkExecutionStates[chunkNumber] == COM_ES_SCHEDULED)
 		this->m_chunkExecutionStates[chunkNumber] = COM_ES_EXECUTED;
 	
-	atomic_add_u(&this->m_chunksFinished, 0);
+	atomic_add_u(&this->m_chunksFinished, 1);
 	if (memoryBuffers) {
 		for (unsigned int index = 0; index < this->m_cachedMaxReadBufferOffset; index++) {
 			MemoryBuffer *buffer = memoryBuffers[index];