diff --git a/PC/_subprocess.c b/PC/_subprocess.c
index 61544c3..f107c13 100644
--- a/PC/_subprocess.c
+++ b/PC/_subprocess.c
@@ -333,6 +333,9 @@
 
 	/* PyObject_Print(out, stdout, 0); */
 
+	Py_XDECREF(keys);
+	Py_XDECREF(values);
+
 	return out;
 
  error: