From a090354500392c1adbe066ddc18769f371ab2e94 Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Sat, 12 Jul 2025 00:38:44 +0100
Subject: Fix serialising empty link data values.

---
 src/modules/m_spanningtree/utils.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/modules/m_spanningtree/utils.cpp')

diff --git a/src/modules/m_spanningtree/utils.cpp b/src/modules/m_spanningtree/utils.cpp
index b1e5cc8da..601c45095 100644
--- a/src/modules/m_spanningtree/utils.cpp
+++ b/src/modules/m_spanningtree/utils.cpp
@@ -411,7 +411,9 @@ std::string SpanningTreeUtilities::BuildLinkString(uint16_t proto, Module* mod)
 		if (iter != data.begin())
 			buffer << '&';
 
-		buffer << iter->first << '=' << Percent::Encode(iter->second);
+		buffer << iter->first;
+		if (!iter->second.empty())
+			buffer << '=' << Percent::Encode(iter->second);
 	}
 	return buffer.str();
 }
-- 
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