diff --git a/src/amrex/space1d/__init__.py b/src/amrex/space1d/__init__.py
index 805a7656..6fac7643 100644
--- a/src/amrex/space1d/__init__.py
+++ b/src/amrex/space1d/__init__.py
@@ -26,6 +26,9 @@
 __license__ = amrex_1d_pybind.__license__
 __author__ = amrex_1d_pybind.__author__
 
+
 # at this place we can enhance Python classes with additional methods written
 # in pure Python or add some other Python logic
 #
+def d_decl(x, y, z):
+    return (x,)
diff --git a/src/amrex/space2d/__init__.py b/src/amrex/space2d/__init__.py
index 81e4edce..c30ed8c5 100644
--- a/src/amrex/space2d/__init__.py
+++ b/src/amrex/space2d/__init__.py
@@ -26,6 +26,9 @@
 __license__ = amrex_2d_pybind.__license__
 __author__ = amrex_2d_pybind.__author__
 
+
 # at this place we can enhance Python classes with additional methods written
 # in pure Python or add some other Python logic
 #
+def d_decl(x, y, z):
+    return (x, y)
diff --git a/src/amrex/space3d/__init__.py b/src/amrex/space3d/__init__.py
index 46e03a89..d8163ea8 100644
--- a/src/amrex/space3d/__init__.py
+++ b/src/amrex/space3d/__init__.py
@@ -26,6 +26,9 @@
 __license__ = amrex_3d_pybind.__license__
 __author__ = amrex_3d_pybind.__author__
 
+
 # at this place we can enhance Python classes with additional methods written
 # in pure Python or add some other Python logic
 #
+def d_decl(x, y, z):
+    return (x, y, z)
diff --git a/tests/test_intvect.py b/tests/test_intvect.py
index d280efa7..32c878bf 100644
--- a/tests/test_intvect.py
+++ b/tests/test_intvect.py
@@ -140,3 +140,8 @@ def test_iv_iter():
     b1 = [x for x in b0]
 
     np.testing.assert_allclose(a1, b1)
+
+
+def test_iv_d_decl():
+    iv = amr.IntVect(*amr.d_decl(1, 2, 3))
+    assert iv == amr.IntVect(1, 2, 3)