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-rw-r--r--src/phone.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/phone.h b/src/phone.h
index c85e895..ca88d6b 100644
--- a/src/phone.h
+++ b/src/phone.h
@@ -131,6 +131,7 @@ private:
bool is_3way; // indicates an acitive 3-way
t_line *line1_3way; // first line in 3-way conf
t_line *line2_3way; // second line in 3-way conf
+ mutable t_mutex mutex_3way;
// Call transfer data. When a REFER comes in, the user has
// to give permission before the triggered INVITE can be sent.