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-rw-r--r--libio/genops.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libio/genops.c b/libio/genops.c
index e0ea74dd5b..eb03664b80 100644
--- a/libio/genops.c
+++ b/libio/genops.c
@@ -350,6 +350,7 @@ __underflow (fp)
     INTUSE(_IO_free_backup_area) (fp);
   return _IO_UNDERFLOW (fp);
 }
+libc_hidden_def (__underflow)
 
 int
 __uflow (fp)