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-rw-r--r--src/modules/m_spanningtree.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/modules/m_spanningtree.cpp b/src/modules/m_spanningtree.cpp
index 7d034c17c..c53d2a01a 100644
--- a/src/modules/m_spanningtree.cpp
+++ b/src/modules/m_spanningtree.cpp
@@ -3423,7 +3423,8 @@ class TreeSocket : public InspSocket
}
else
{
- Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
+ if (!prefix.empty())
+ Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
return true;
}
}