diff --git a/lib/error.c b/lib/error.c
index dc694c03b..3161538e1 100644
--- a/lib/error.c
+++ b/lib/error.c
@@ -78,6 +78,7 @@ unsigned int error_message_count;
 
 # define program_name program_invocation_name
 # include <errno.h>
+# include <libio/libioP.h>
 
 /* In GNU libc we want do not want to use the common name `error' directly.
    Instead make it a weak alias.  */
@@ -92,7 +93,9 @@ extern void __error_at_line (int status, int errnum, const char *file_name,
 
 # ifdef USE_IN_LIBIO
 #  include <libio/iolibio.h>
-#  define fflush(s) _IO_fflush (s)
+#  define fflush(s) INTUSE(_IO_fflush) (s)
+#  undef putc
+#  define putc(c, fp) INTUSE(_IO_putc) (c, fp)
 # endif
 
 #else /* not _LIBC */