diff --git a/files/squid/helpers/rules.d/cplusplus.rules b/files/squid/helpers/rules.d/cplusplus.rules
index 5dec0d9062e2534ffa118a494a547f00c44c6761..708f33fe6805d889059813ae9affcc719f207e84 100644
--- a/files/squid/helpers/rules.d/cplusplus.rules
+++ b/files/squid/helpers/rules.d/cplusplus.rules
@@ -1,3 +1,7 @@
+// Experimental 2024-12-03
+^https?://cppreference-45864d\.gitlab-pages\.liu\.se/.* true
+^https?://upp\.gitlab-pages\.liu\.se/cppreference/.* true
+
 // C++ reference
 ^https?://www\.cplusplus\.com/forum.*       false
 ^https?://www\.cplusplus\.com/article.*     false