diff --git a/opaque.c b/opaque.c
index eacc09f..f03b70a 100644
--- a/opaque.c
+++ b/opaque.c
@@ -48,7 +48,7 @@
 
 int register_opaque_master(const struct opaque_master *mst, void *data)
 {
-	struct registered_master rmst;
+	struct registered_master rmst = { 0 };
 
 	if (mst->shutdown) {
 		if (register_shutdown(mst->shutdown, data)) {