diff --git a/common-main.c b/common-main.c
index 033778b3c56a35..4b73e3760a27ff 100644
--- a/common-main.c
+++ b/common-main.c
@@ -86,5 +86,10 @@ int common_exit(const char *file, int line, int code)
 	check_bug_if_BUG();
 	trace2_cmd_exit_fl(file, line, code);
 
+	/**
+	 * Some software (such as security software) may change buffer type of stdout.
+	 * It will no output without fflush manually.
+	 */
+	fflush(stdout);
 	return code;
 }