diff --git a/docs/source/conf.py b/docs/source/conf.py
index 77b1669ef0..1e1c91d732 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -144,7 +144,11 @@ def setup(app):
 
 # Excluded links for linkcheck
 # These should be periodically checked by hand to ensure that they are still functional
-linkcheck_ignore = [R"https://www.raspberrypi.com/software/", R"http://10\..+"]
+linkcheck_ignore = [
+    R"https://www.raspberrypi.com/software/",
+    R"http://10\..+",
+    R"https://gnu.org/",
+]
 
 token = os.environ.get("GITHUB_TOKEN", None)
 if token: