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-rw-r--r--stdio-common/printf_fp.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c
index 6e5ff5855b..ae25ab6fc5 100644
--- a/stdio-common/printf_fp.c
+++ b/stdio-common/printf_fp.c
@@ -986,7 +986,9 @@ ___printf_fp (FILE *fp,
 	    if (*wtp != decimalwc)
 	      /* Round up.  */
 	      (*wtp)++;
-	    else if (__builtin_expect (spec == 'g' && type == 'f' && info->alt,
+	    else if (__builtin_expect (spec == 'g' && type == 'f' && info->alt
+				       && wtp == wstartp + 1
+				       && wstartp[0] == L'0',
 				       0))
 	      /* This is a special case: the rounded number is 1.0,
 		 the format is 'g' or 'G', and the alternative format