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-rw-r--r--res/res_smdi.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/res/res_smdi.c b/res/res_smdi.c
index 3a8a5f4d6..bd3170ee8 100644
--- a/res/res_smdi.c
+++ b/res/res_smdi.c
@@ -1274,7 +1274,9 @@ static int unload_module(void)
ast_cond_signal(&mwi_monitor.cond);
ast_mutex_unlock(&mwi_monitor.lock);
- pthread_join(mwi_monitor.thread, NULL);
+ if (mwi_monitor.thread != AST_PTHREADT_NULL) {
+ pthread_join(mwi_monitor.thread, NULL);
+ }
ast_custom_function_unregister(&smdi_msg_retrieve_function);
ast_custom_function_unregister(&smdi_msg_function);