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-rw-r--r--malloc/mtrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/malloc/mtrace.c b/malloc/mtrace.c
index a7f0a90d5f..f3c1387274 100644
--- a/malloc/mtrace.c
+++ b/malloc/mtrace.c
@@ -244,7 +244,7 @@ mtrace ()
       if (mallstream != NULL)
 	{
 	  /* Be sure it doesn't malloc its buffer!  */
-	  setbuffer (mallstream, malloc_trace_buffer, TRACE_BUFFER_SIZE);
+	  setvbuf (mallstream, malloc_trace_buffer, _IOFBF, TRACE_BUFFER_SIZE);
 	  fprintf (mallstream, "= Start\n");
 	  tr_old_free_hook = __free_hook;
 	  __free_hook = tr_freehook;