diff --git a/src/include/switch_caller.h b/src/include/switch_caller.h
index d35fa99a5e..8b146ba616 100644
--- a/src/include/switch_caller.h
+++ b/src/include/switch_caller.h
@@ -112,6 +112,7 @@ struct switch_caller_extension {
 	switch_caller_application_t *last_application;
 	/*! Pointer to the entire stack of applications for this extension */
 	switch_caller_application_t *applications;
+	struct switch_caller_extension *next;
 };
 
 /*!
diff --git a/src/switch_channel.c b/src/switch_channel.c
index c0c4207d30..937ca3e61c 100644
--- a/src/switch_channel.c
+++ b/src/switch_channel.c
@@ -757,7 +757,11 @@ SWITCH_DECLARE(void) switch_channel_set_caller_extension(switch_channel_t *chann
 														 switch_caller_extension_t *caller_extension)
 {
 	assert(channel != NULL);
+
+	switch_mutex_lock(channel->profile_mutex);
+	caller_extension->next = channel->caller_extension;
 	channel->caller_extension = caller_extension;
+	switch_mutex_unlock(channel->profile_mutex);
 }