diff --git a/sapi/cli/php_cli.c b/sapi/cli/php_cli.c
index 2e074392997..01099c0d8c3 100644
--- a/sapi/cli/php_cli.c
+++ b/sapi/cli/php_cli.c
@@ -464,6 +464,7 @@ int main(int argc, char *argv[])
 		SG(options) |= SAPI_OPTION_NO_CHDIR;
 		zend_alter_ini_entry("register_argc_argv", 19, "1", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
 		zend_alter_ini_entry("html_errors", 12, "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
+		zend_alter_ini_entry("implicit_flush", 15, "1", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
 		zend_alter_ini_entry("max_execution_time", 19, "0", 1, PHP_INI_SYSTEM, PHP_INI_STAGE_ACTIVATE);
 
 		zend_uv.html_errors = 0; /* tell the engine we're in non-html mode */