diff --git a/compile_server/app/process_handling.py b/compile_server/app/process_handling.py
index f059308..d2e655f 100644
--- a/compile_server/app/process_handling.py
+++ b/compile_server/app/process_handling.py
@@ -79,7 +79,7 @@ class SeparateProcess(object):
                     f.write(line)
 
             # Write the return code
-            self.p.poll()
+            self.p.wait()
             returncode = self.p.returncode
 
             # Cleanup