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-rw-r--r--stdio-common/vfprintf.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index 216ab291fa..3f13026e14 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -969,9 +969,10 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
       if (!left)							      \
 	PAD (L' ');							      \
       if (fspec == NULL)						      \
-	outchar (btowc ((unsigned char) va_arg (ap, int))); /* Promoted.  */  \
+	outchar (__btowc ((unsigned char) va_arg (ap, int))); /* Promoted. */ \
       else								      \
-	outchar (btowc ((unsigned char) args_value[fspec->data_arg].pa_char));\
+	outchar (__btowc ((unsigned char)				      \
+			  args_value[fspec->data_arg].pa_char));	      \
       if (left)								      \
 	PAD (L' ');							      \
       break;								      \