diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 64026f7..55b008c 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -1814,8 +1814,10 @@ static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd
                 r = bus_read_message(bus, hint_priority, priority);
                 if (r < 0)
                         return r;
-                if (r == 0)
+                if (r == 0) {
+                        *m = NULL;
                         return ret;
+                }
 
                 ret = 1;
         }