diff --git a/flow/scripts/open.tcl b/flow/scripts/open.tcl
index 7f69350eb8..70467963a4 100644
--- a/flow/scripts/open.tcl
+++ b/flow/scripts/open.tcl
@@ -60,8 +60,10 @@ proc read_timing {input_file} {
 if {[env_var_equals GUI_TIMING 1]} {
   puts "GUI_TIMING=1 reading timing, takes a little while for large designs..."
   read_timing $input_file
-  gui::select_chart "Endpoint Slack"
-  log_cmd gui::update_timing_report
+  if {[gui::enabled]} {
+    gui::select_chart "Endpoint Slack"
+    log_cmd gui::update_timing_report
+  }
 }
 
 fast_route