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-rw-r--r--src/phone.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/phone.cpp b/src/phone.cpp
index c4e515f..401abb1 100644
--- a/src/phone.cpp
+++ b/src/phone.cpp
@@ -339,7 +339,7 @@ void t_phone::refer(const t_url &uri, const string &display) {
void t_phone::refer(unsigned short lineno_from, unsigned short lineno_to)
{
- t_rwmutex_reader x(lines_mtx);
+ t_rwmutex_future_writer x(lines_mtx);
// The nicest transfer is an attended transfer. An attended transfer
// is only possible of the transfer target supports the 'replaces'