diff --git a/src/dev-utils/platform/unix/OrcaSlicer.desktop b/src/dev-utils/platform/unix/OrcaSlicer.desktop
index c28ce56d44..188d2ead34 100644
--- a/src/dev-utils/platform/unix/OrcaSlicer.desktop
+++ b/src/dev-utils/platform/unix/OrcaSlicer.desktop
@@ -5,7 +5,7 @@ Icon=OrcaSlicer
 Exec=orca-slicer %U
 Terminal=false
 Type=Application
-MimeType=model/stl;model/3mf;application/vnd.ms-3mfdocument;application/prs.wavefront-obj;application/x-amf;x-scheme-handler/orcaslicer;
+MimeType=model/stl;model/3mf;application/vnd.ms-3mfdocument;application/prs.wavefront-obj;application/x-amf;x-scheme-handler/orcaslicer;model/step;
 Categories=Graphics;3DGraphics;Engineering;
 Keywords=3D;Printing;Slicer;slice;3D;printer;convert;gcode;stl;obj;amf;SLA
 StartupNotify=false