diff --git a/ironic_inspector/node_cache.py b/ironic_inspector/node_cache.py
index 2b1737597..02549c69f 100644
--- a/ironic_inspector/node_cache.py
+++ b/ironic_inspector/node_cache.py
@@ -497,7 +497,7 @@ def find_node(**attributes):
                   % (name, value))
         value_list = []
         for v in value:
-            value_list.append('name="%s" AND value="%s"' % (name, v))
+            value_list.append("name='%s' AND value='%s'" % (name, v))
         stmt = ('select distinct uuid from attributes where ' +
                 ' OR '.join(value_list))
         rows = (db.model_query(db.Attribute.uuid).from_statement(
diff --git a/releasenotes/notes/fix-crash-when-use-postgresql-ac6c708f48f55c83.yaml b/releasenotes/notes/fix-crash-when-use-postgresql-ac6c708f48f55c83.yaml
new file mode 100644
index 000000000..4e6d968e4
--- /dev/null
+++ b/releasenotes/notes/fix-crash-when-use-postgresql-ac6c708f48f55c83.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - Use only single quotes for strings inside SQL statements. Fixes a crash
+    when PostgreSQL is used as a database backend.