diff --git a/aequilibrae/matrix/sparse_matrix.pyx b/aequilibrae/matrix/sparse_matrix.pyx
index 7c40fa6a4..2c555cdb2 100644
--- a/aequilibrae/matrix/sparse_matrix.pyx
+++ b/aequilibrae/matrix/sparse_matrix.pyx
@@ -22,4 +22,4 @@ cdef class SparseMatrix:
         pass
 
     cpdef void helloworld(SparseMatrix self):
-        print("Hello from cpdef")
+        print("Hello from cpdef.")