diff --git a/pym/cl_utils.py b/pym/cl_utils.py
index ec9397e..96b9a7a 100644
--- a/pym/cl_utils.py
+++ b/pym/cl_utils.py
@@ -220,7 +220,7 @@ class process:
         """Get return code"""
         self._open()
         if self.pipe.returncode == None:
-            self.cacheresult = self.pipe.communicate()
+            self.cacheresult = self.pipe.communicate()[0]
         return self.pipe.returncode
 
     def success(self):