diff --git a/pympipool/shared/interface.py b/pympipool/shared/interface.py
index 54818c79..1d585824 100644
--- a/pympipool/shared/interface.py
+++ b/pympipool/shared/interface.py
@@ -42,6 +42,7 @@ def generate_command(self, command_lst):
         return command_lst
 
     def shutdown(self, wait=True):
+        self._process.communicate()
         self._process.terminate()
         if wait:
             self._process.wait()