diff --git a/doc/conf.py b/doc/conf.py
index ab637f466f..5edd0d6c0b 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -23,11 +23,13 @@
 # https://about.readthedocs.com/blog/2024/07/addons-by-default/
 import os
 
-# Set canonical URL from the Read the Docs Domain
+# Define the canonical URL if you are using a custom domain on Read the Docs
 html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")
 
 # Tell Jinja2 templates the build is running on Read the Docs
 if os.environ.get("READTHEDOCS", "") == "True":
+    if "html_context" not in globals():
+        html_context = {}
     html_context["READTHEDOCS"] = True
 
 # -- General configuration ------------------------------------------------
diff --git a/generated-doc/out/conf.py b/generated-doc/out/conf.py
index ab637f466f..5edd0d6c0b 100644
--- a/generated-doc/out/conf.py
+++ b/generated-doc/out/conf.py
@@ -23,11 +23,13 @@
 # https://about.readthedocs.com/blog/2024/07/addons-by-default/
 import os
 
-# Set canonical URL from the Read the Docs Domain
+# Define the canonical URL if you are using a custom domain on Read the Docs
 html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")
 
 # Tell Jinja2 templates the build is running on Read the Docs
 if os.environ.get("READTHEDOCS", "") == "True":
+    if "html_context" not in globals():
+        html_context = {}
     html_context["READTHEDOCS"] = True
 
 # -- General configuration ------------------------------------------------