diff --git a/drivers/misc/rwbuffer.c b/drivers/misc/rwbuffer.c
index 8e57625dcfd..28b94f3df97 100644
--- a/drivers/misc/rwbuffer.c
+++ b/drivers/misc/rwbuffer.c
@@ -334,6 +334,8 @@ static ssize_t rwb_writebuffer(FAR struct rwbuffer_s *rwb,
         {
           return ret;
         }
+
+      nblocks = 0;
     }
 
   while (nblocks > 0)