diff --git a/scripts/ztplot.py b/scripts/ztplot.py
index a00808de407be617501a7e4444e199ddbdd5341b..4f07f8125c9ba22704967555d5359a6400cf22bb 100755
--- a/scripts/ztplot.py
+++ b/scripts/ztplot.py
@@ -208,7 +208,7 @@ def main():
     ligier_port = int(args['-p'])
 
     pipe = kp.Pipeline()
-    pipe.attach(LocalDBService)
+    pipe.attach(LocalDBService, thread_safety=False)
     pipe.attach(kp.io.ch.CHPump,
                 host=ligier_ip,
                 port=ligier_port,