1 files changed, 2 insertions, 1 deletions
diff --git a/exec.c b/exec.c
index 7d3eb1adab..ef79d6d29e 100644
--- a/exec.c
+++ b/exec.c
@@ -1491,7 +1491,8 @@ void cpu_set_log(int log_flags)
             static char logfile_buf[4096];
             setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
         }
-#else
+#elif !defined(_WIN32)
+        /* Win32 doesn't support line-buffering and requires size >= 2 */
         setvbuf(logfile, NULL, _IOLBF, 0);
 #endif
         log_append = 1;