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-rw-r--r--src/modules/m_spanningtree.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/modules/m_spanningtree.cpp b/src/modules/m_spanningtree.cpp
index e9cdeab93..cbef34ff7 100644
--- a/src/modules/m_spanningtree.cpp
+++ b/src/modules/m_spanningtree.cpp
@@ -1404,7 +1404,7 @@ class TreeSocket : public InspSocket
if (this->keylength)
{
// pad it to the key length
- int n = line.length() % this->keylength;
+ int n = this->keylength - (line.length() % this->keylength);
if (n)
{
log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);