diff --git a/drivers/pipes/fifo.c b/drivers/pipes/fifo.c
index f629c6e3da..61010d3a1e 100644
--- a/drivers/pipes/fifo.c
+++ b/drivers/pipes/fifo.c
@@ -39,7 +39,7 @@
  * Private Data
  ****************************************************************************/
 
-static const struct file_operations fifo_fops =
+static const struct file_operations g_fifo_fops =
 {
   pipecommon_open,     /* open */
   pipecommon_close,    /* close */
@@ -104,7 +104,7 @@ int nx_mkfifo(FAR const char *pathname, mode_t mode, size_t bufsize)
       return -ENOMEM;
     }
 
-  ret = register_driver(pathname, &fifo_fops, mode, (FAR void *)dev);
+  ret = register_driver(pathname, &g_fifo_fops, mode, (FAR void *)dev);
   if (ret != 0)
     {
       pipecommon_freedev(dev);
diff --git a/drivers/pipes/pipe.c b/drivers/pipes/pipe.c
index 14d0529297..96599dd0e7 100644
--- a/drivers/pipes/pipe.c
+++ b/drivers/pipes/pipe.c
@@ -59,7 +59,7 @@ static int pipe_close(FAR struct file *filep);
  * Private Data
  ****************************************************************************/
 
-static const struct file_operations pipe_fops =
+static const struct file_operations g_pipe_fops =
 {
   pipecommon_open,     /* open */
   pipe_close,          /* close */
@@ -193,7 +193,7 @@ static int pipe_register(size_t bufsize, int flags,
 
       /* Register the pipe device */
 
-      ret = register_driver(devname, &pipe_fops, 0666, (FAR void *)dev);
+      ret = register_driver(devname, &g_pipe_fops, 0666, (FAR void *)dev);
       if (ret != 0)
         {
           nxsem_post(&g_pipesem);