diff --git a/modules/protocol/inspircd.cpp b/modules/protocol/inspircd.cpp
index 187bbf68e..bfee6c58b 100644
--- a/modules/protocol/inspircd.cpp
+++ b/modules/protocol/inspircd.cpp
@@ -571,6 +571,9 @@ public:
 	void SendEOB() override
 	{
 		Uplink::Send("ENDBURST");
+
+		if (spanningtree_proto_ver < 1206)
+			SendGlobops(nullptr, "Support for InspIRCd v3 is deprecated and will be removed in a future release. Please consider upgrading to InspIRCd v4.")
 	}
 
 	void SendGlobops(const MessageSource &source, const Anope::string &buf) override