diff --git a/plugins/GCodeGzReader/GCodeGzReader.py b/plugins/GCodeGzReader/GCodeGzReader.py
index fd9bf0ed84..36fcfad01a 100644
--- a/plugins/GCodeGzReader/GCodeGzReader.py
+++ b/plugins/GCodeGzReader/GCodeGzReader.py
@@ -15,7 +15,7 @@ class GCodeGzReader(MeshReader):
 
     def __init__(self):
         super().__init__()
-        self._supported_extensions = [".gz"]
+        self._supported_extensions = [".gcode.gz"]
 
     def read(self, file_name):
         with open(file_name, "rb") as file: