diff --git a/lib/lib_fopen.c b/lib/lib_fopen.c
index 92009cd276..e45a891f63 100644
--- a/lib/lib_fopen.c
+++ b/lib/lib_fopen.c
@@ -212,7 +212,9 @@ FAR struct file_struct *lib_fdopen(int fd, FAR const char *mode,
         }
     }
 
+#if CONFIG_STDIO_BUFFER_SIZE > 0
 errout_with_sem:
+#endif
   stream_semgive(slist);
 
 errout:
diff --git a/lib/lib_init.c b/lib/lib_init.c
index 05d513bb96..19222535dd 100644
--- a/lib/lib_init.c
+++ b/lib/lib_init.c
@@ -168,8 +168,9 @@ void lib_releaselist(FAR struct streamlist *list)
 
        if (crefs <= 0)
           {
+#if CONFIG_STDIO_BUFFER_SIZE > 0
             int i;
-
+#endif
             /* Destroy the semaphore and release the filelist */
 
             (void)sem_destroy(&list->sl_sem);
diff --git a/lib/lib_libfread.c b/lib/lib_libfread.c
index c0a43e0c88..0ff12d0dd5 100644
--- a/lib/lib_libfread.c
+++ b/lib/lib_libfread.c
@@ -260,7 +260,9 @@ ssize_t lib_fread(FAR void *ptr, size_t count, FAR FILE *stream)
             }
         }
 #endif
+#if CONFIG_STDIO_BUFFER_SIZE > 0
     short_read:
+#endif
       bytes_read = dest - (unsigned char*)ptr;
     err_out:
       lib_give_semaphore(stream);