diff --git a/odoo/service/server.py b/odoo/service/server.py
index 207d590e724..9c4eafcc948 100644
--- a/odoo/service/server.py
+++ b/odoo/service/server.py
@@ -685,7 +685,7 @@ class PreforkServer(CommonServer):
                 raise KeyboardInterrupt
             elif sig == signal.SIGQUIT:
                 # dump stacks on kill -3
-                self.dumpstacks()
+                dumpstacks()
             elif sig == signal.SIGUSR1:
                 # log ormcache stats on kill -SIGUSR1
                 log_ormcache_stats()