diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 9eec09b202..6c2fb9a59d 100755
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -15,7 +15,6 @@ from UM.Math.Vector import Vector
 from UM.Mesh.MeshBuilder import MeshBuilder
 from UM.Mesh.MeshReader import MeshReader
 from UM.Scene.GroupDecorator import GroupDecorator
-from UM.MimeTypeDatabase import MimeTypeDatabase, MimeType
 
 from cura.Settings.ExtruderManager import ExtruderManager
 from cura.Scene.CuraSceneNode import CuraSceneNode
@@ -26,15 +25,6 @@ from cura.Machines.QualityManager import getMachineDefinitionIDForQualitySearch
 
 MYPY = False
 
-
-MimeTypeDatabase.addMimeType(
-    MimeType(
-        name = "application/x-cura-project-file",
-        comment = "Cura Project File",
-        suffixes = ["curaproject.3mf"]
-    )
-)
-
 try:
     if not MYPY:
         import xml.etree.cElementTree as ET
diff --git a/plugins/3MFReader/__init__.py b/plugins/3MFReader/__init__.py
index 9da54586a3..304cd8ef65 100644
--- a/plugins/3MFReader/__init__.py
+++ b/plugins/3MFReader/__init__.py
@@ -13,8 +13,24 @@ from . import ThreeMFWorkspaceReader
 
 from UM.i18n import i18nCatalog
 from UM.Platform import Platform
+from UM.MimeTypeDatabase import MimeTypeDatabase, MimeType
 catalog = i18nCatalog("cura")
 
+MimeTypeDatabase.addMimeType(
+    MimeType(
+        name = "application/x-cura-project-file",
+        comment = "Cura Project File",
+        suffixes = ["curaproject.3mf"]
+    )
+)
+MimeTypeDatabase.addMimeType(
+    MimeType(
+        name = "application/x-cura-project-file",
+        comment = "Cura Project File",
+        suffixes = ["3mf"]
+    )
+)
+
 def getMetaData() -> Dict:
     # Workarround for osx not supporting double file extensions correctly.
     if Platform.isOSX():