diff --git a/openerp/service/server.py b/openerp/service/server.py
index 965b1608e6d..fdd95a73ebf 100644
--- a/openerp/service/server.py
+++ b/openerp/service/server.py
@@ -613,7 +613,7 @@ class PreforkServer(CommonServer):
             _logger.info("Stopping gracefully")
             limit = time.time() + self.timeout
             for pid in self.workers.keys():
-                self.worker_kill(pid, signal.SIGTERM)
+                self.worker_kill(pid, signal.SIGINT)
             while self.workers and time.time() < limit:
                 self.process_zombie()
                 time.sleep(0.1)