diff --git a/plugins/GCodeProfileReader/GCodeProfileReader.py b/plugins/GCodeProfileReader/GCodeProfileReader.py
index 02727dec4c..524e4662d5 100644
--- a/plugins/GCodeProfileReader/GCodeProfileReader.py
+++ b/plugins/GCodeProfileReader/GCodeProfileReader.py
@@ -11,6 +11,13 @@ import re #Regular expressions for parsing escape characters in the settings.
 #   It reads the profile data from g-code files and stores it in a new profile.
 #   This class currently does not process the rest of the g-code in any way.
 class GCodeProfileReader(ProfileReader):
+    ##  The file format version of the serialised g-code.
+    #
+    #   It can only read settings with the same version as the version it was
+    #   written with. If the file format is changed in a way that breaks reverse
+    #   compatibility, increment this version number!
+    version = 1
+    
     ##  Initialises the g-code reader as a profile reader.
     def __init__(self):
         super().__init__()
@@ -22,7 +29,6 @@ class GCodeProfileReader(ProfileReader):
     #   specified file was no g-code or contained no parsable profile, \code
     #   None \endcode is returned.
     def read(self, file_name):
-        version = 1 #IF YOU CHANGE THIS FUNCTION IN A WAY THAT BREAKS REVERSE COMPATIBILITY, INCREMENT THIS VERSION NUMBER!
         prefix = ";SETTING_" + str(version) + " "
         
         #Loading all settings from the file. They are all at the end, but Python has no reverse seek any more since Python3. TODO: Consider moving settings to the start?
diff --git a/plugins/GCodeWriter/GCodeWriter.py b/plugins/GCodeWriter/GCodeWriter.py
index 69a94f59d3..20a32f7822 100644
--- a/plugins/GCodeWriter/GCodeWriter.py
+++ b/plugins/GCodeWriter/GCodeWriter.py
@@ -9,6 +9,13 @@ import re #For escaping characters in the settings.
 
 
 class GCodeWriter(MeshWriter):
+    ##  The file format version of the serialised g-code.
+    #
+    #   It can only read settings with the same version as the version it was
+    #   written with. If the file format is changed in a way that breaks reverse
+    #   compatibility, increment this version number!
+    version = 1
+    
     def __init__(self):
         super().__init__()
 
@@ -36,7 +43,6 @@ class GCodeWriter(MeshWriter):
     #   \param profile The profile to serialise.
     #   \return A serialised string of the profile.
     def _serialiseProfile(self, profile):
-        version = 1 #IF YOU CHANGE THIS FUNCTION IN A WAY THAT BREAKS REVERSE COMPATIBILITY, INCREMENT THIS VERSION NUMBER!
         prefix = ";SETTING_" + str(version) + " " #The prefix to put before each line.
         
         serialised = profile.serialise()