diff --git a/pjlib/src/pj/ioqueue_common_abs.c b/pjlib/src/pj/ioqueue_common_abs.c
index 947a400..b7add9a 100644
--- a/pjlib/src/pj/ioqueue_common_abs.c
+++ b/pjlib/src/pj/ioqueue_common_abs.c
@@ -33,6 +33,7 @@
 {
     ioqueue->lock = NULL;
     ioqueue->auto_delete_lock = 0;
+    ioqueue->default_concurrency = PJ_IOQUEUE_DEFAULT_ALLOW_CONCURRENCY;
 }
 
 static pj_status_t ioqueue_destroy(pj_ioqueue_t *ioqueue)