diff --git a/src/_igraph/graphobject.c b/src/_igraph/graphobject.c
index 95a29e5ff..894e35d26 100644
--- a/src/_igraph/graphobject.c
+++ b/src/_igraph/graphobject.c
@@ -4912,7 +4912,7 @@ PyObject *igraphmodule_Graph_harmonic_centrality(igraphmodule_GraphObject * self
       return NULL;
     }
     if (igraph_harmonic_centrality_cutoff(&self->g, &res, vs, mode, weights,
-        PyFloat_AsDouble(cutoff_num), PyObject_IsTrue(normalized_o))) {
+        PyObject_IsTrue(normalized_o), PyFloat_AsDouble(cutoff_num))) {
       igraph_vs_destroy(&vs);
       igraph_vector_destroy(&res);
       if (weights) { igraph_vector_destroy(weights); free(weights); }