diff --git a/src/core/ddsc/src/dds_listener.c b/src/core/ddsc/src/dds_listener.c
index d0f40ac..46349f6 100644
--- a/src/core/ddsc/src/dds_listener.c
+++ b/src/core/ddsc/src/dds_listener.c
@@ -85,6 +85,7 @@ dds_listener_copy(_Out_ dds_listener_t * __restrict dst, _In_ const dds_listener
     dstl->on_sample_lost = srcl->on_sample_lost;
     dstl->on_sample_rejected = srcl->on_sample_rejected;
     dstl->on_subscription_matched = srcl->on_subscription_matched;
+    dstl->arg = srcl->arg;
 }
 
 void