diff --git a/src/openexr.imageio/exroutput.cpp b/src/openexr.imageio/exroutput.cpp
index c3e4c44050..f8d9df85d2 100644
--- a/src/openexr.imageio/exroutput.cpp
+++ b/src/openexr.imageio/exroutput.cpp
@@ -190,6 +190,7 @@ class OpenEXROutput final : public ImageOutput {
         m_tiled_output_part.reset();
         m_deep_scanline_output_part.reset();
         m_deep_tiled_output_part.reset();
+        m_levelmode = Imf::ONE_LEVEL;
         m_subimage = -1;
         m_miplevel = -1;
         m_subimagespecs.clear();