diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 8de0b1a..dde8880 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.8.5
+current_version = 0.8.6
 commit = True
 tag = False
 
diff --git a/CITATION.cff b/CITATION.cff
index dcff5f1..62d8223 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -20,4 +20,4 @@ url: 'https://atomrdf.pyscal.org'
 license: "MIT"
 repository-code: https://github.com/pyscal/atomRDF
 type: software
-version: 0.8.5
+version: 0.8.6
diff --git a/atomrdf/network/ontology.py b/atomrdf/network/ontology.py
index 46e35d4..4cb2504 100644
--- a/atomrdf/network/ontology.py
+++ b/atomrdf/network/ontology.py
@@ -84,6 +84,7 @@ def read_ontology():
     #CMSO -> PODO IMPURITY
     combo.add_path(("cmso:Material", "cmso:hasDefect", "podo:SubstitutionalImpurity"))
     combo.add_path(("cmso:Material", "cmso:hasDefect", "podo:InterstitialImpurity"))
+    combo.add_path(("podo:InterstitialImpurity", "rdfs:label", "string"))
     combo.add_path(("cmso:AtomicScaleSample", "podo:hasNumberOfImpurityAtoms", "int"))
     combo.add_path(("cmso:AtomicScaleSample", "podo:hasImpurityConcentration", "float"))
     
diff --git a/atomrdf/structure.py b/atomrdf/structure.py
index 0ca136d..a328569 100644
--- a/atomrdf/structure.py
+++ b/atomrdf/structure.py
@@ -1065,11 +1065,14 @@ def add_interstitial_impurities(
             )
             json_io.write_file(outfile, datadict)
 
-            self.add_triples_for_interstitial_impurities(conc_of_impurities, no_of_impurities=no_of_impurities)
+            self.add_triples_for_interstitial_impurities(conc_of_impurities, no_of_impurities=no_of_impurities, label=void_type)
         return sysn
 
-    def add_triples_for_interstitial_impurities(self, conc_of_impurities, no_of_impurities=None):
-        defect = self.graph.create_node(f"{self._name}_InterstitialImpurity", PODO.InterstitialImpurity)
+    def add_triples_for_interstitial_impurities(self, conc_of_impurities, no_of_impurities=None, label=None):
+        if label is not None:
+            defect = self.graph.create_node(f"{self._name}_InterstitialImpurity", PODO.InterstitialImpurity, label=label)
+        else:
+            defect = self.graph.create_node(f"{self._name}_InterstitialImpurity", PODO.InterstitialImpurity)
         self.graph.add((self.material, CMSO.hasDefect, defect))
         self.graph.add((self.sample, PODO.hasImpurityConcentration, Literal(conc_of_impurities, datatype=XSD.float)))
         if no_of_impurities is not None:
diff --git a/setup.py b/setup.py
index 90a0e24..c5db5ac 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name='atomrdf',
-    version='0.8.5',
+    version='0.8.6',
     author='Abril Azocar Guzman, Sarath Menon',
     author_email='sarath.menon@pyscal.org',
     description='Ontology based structural manipulation and quering',