diff --git a/supersdr.py b/supersdr.py
index c403acb..016274e 100755
--- a/supersdr.py
+++ b/supersdr.py
@@ -344,6 +344,7 @@ def plot_eibi(surface_):
 run_index = 0
 run_index_automode = 0
 show_bigmsg = None
+msg_text = ""
 
 while not wf_quit:
     run_index += 1