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-rw-r--r--posix/regex_internal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/posix/regex_internal.c b/posix/regex_internal.c
index a3dcfbbb65..96f113745f 100644
--- a/posix/regex_internal.c
+++ b/posix/regex_internal.c
@@ -242,7 +242,7 @@ build_wcs_buffer (pstr)
 	  for (i = 0; i < pstr->mb_cur_max && i < remain_len; ++i)
 	    {
 	      ch = pstr->raw_mbs [pstr->raw_mbs_idx + byte_idx + i];
-	      buf[i] = pstr->trans[ch];
+	      buf[i] = pstr->mbs[byte_idx + i] = pstr->trans[ch];
 	    }
 	  p = (const char *) buf;
 	}