diff --git a/lib/util/ast.js b/lib/util/ast.js
index 374e766e..e420ef18 100644
--- a/lib/util/ast.js
+++ b/lib/util/ast.js
@@ -289,6 +289,11 @@ function parseNodeRecursive(rootNode, childNode, cb, skipConditional = false, is
         childNode.properties.forEach((prop) => {
           const isUsedByClassNamesPlugin = rootNode.callee && rootNode.callee.name === 'classnames';
 
+          if (prop.type === 'SpreadElement') {
+            // Ignore spread elements
+            return;
+          }
+
           if (prop.key.type === 'Identifier' && ignoredKeys.includes(prop.key.name)) {
             // Ignore specific keys defined in settings
             return;
diff --git a/tests/lib/rules/no-custom-classname.js b/tests/lib/rules/no-custom-classname.js
index 534c0a01..d4bcda57 100644
--- a/tests/lib/rules/no-custom-classname.js
+++ b/tests/lib/rules/no-custom-classname.js
@@ -985,6 +985,14 @@ ruleTester.run("no-custom-classname", rule, {
         },
       ],
     },
+    {
+      code: `
+        const obj = { a: 12 };
+        <div className={{
+          ...obj
+        }}>Spread inside classname object</div>
+      `,
+    },
   ],
 
   invalid: [