diff --git a/src/creader_module.c b/src/creader_module.c
index d4134ff..caae5b3 100644
--- a/src/creader_module.c
+++ b/src/creader_module.c
@@ -55,6 +55,7 @@ static PyObject *clusterize(PyObject *self, PyObject *args,
     if (nc != size) {
         PyErr_SetString(PyExc_TypeError, "Parsed wrong size array!");
     }
+    Py_DECREF(cl_array);
     return cl_analysis;
 }