diff --git a/sys/shm/shmpipe.c b/sys/shm/shmpipe.c
index bde4c4e70e..c692417e1d 100644
--- a/sys/shm/shmpipe.c
+++ b/sys/shm/shmpipe.c
@@ -867,8 +867,8 @@ again:
           goto again;
         break;
       }
-      prev_buf = buffer;
     }
+    prev_buf = buffer;
   }
 
   for (item = self->clients; item; item = item->next) {