diff --git a/src/aiida/orm/nodes/data/array/kpoints.py b/src/aiida/orm/nodes/data/array/kpoints.py
index 86525fde4..b4dadf2a8 100644
--- a/src/aiida/orm/nodes/data/array/kpoints.py
+++ b/src/aiida/orm/nodes/data/array/kpoints.py
@@ -230,7 +230,7 @@ def set_cell_from_structure(self, structuredata):
                 'An instance of StructureData or aiida-atomistic StructureData should be passed to '
                 'the KpointsData, found instead {}'.format(structuredata.__class__)
             )
-            if has_atomistic:
+            if has_atomistic():
                 from aiida_atomistic import StructureData as AtomisticStructureData
 
                 if not isinstance(structuredata, AtomisticStructureData):
diff --git a/src/aiida/orm/nodes/data/structure.py b/src/aiida/orm/nodes/data/structure.py
index f06d0c22d..875736f4c 100644
--- a/src/aiida/orm/nodes/data/structure.py
+++ b/src/aiida/orm/nodes/data/structure.py
@@ -1889,7 +1889,7 @@ def to_atomistic(self):
         """
         Returns the atomistic StructureData version of the orm.StructureData one.
         """
-        if not has_atomistic:
+        if not has_atomistic():
             raise ImportError(
                 'aiida-atomistic plugin is not installed, \
                 please install it to have full support for atomistic structures'