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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 dcc5cdbdaa..ef9165e448 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -890,8 +890,9 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
 	    assert (__mbsinit (&mbstate));				      \
 	    s2 = (const wchar_t *) string;				      \
 	    string = alloca (len + 1);					      \
-	    (void) __wcsrtombs (string, &s2, prec != -1 ? prec : UINT_MAX,    \
-				&mbstate);				      \
+	    (void) __wcsrtombs (string, &s2, len + 1, &mbstate);	      \
+	    if (prec < min)						      \
+	      len = prec;						      \
 	  }								      \
 									      \
 	if ((width -= len) < 0)						      \