diff --git a/packages/eslint-plugin/src/rules/indent.ts b/packages/eslint-plugin/src/rules/indent.ts
index 704bc09dc65..a8845fb6cd9 100644
--- a/packages/eslint-plugin/src/rules/indent.ts
+++ b/packages/eslint-plugin/src/rules/indent.ts
@@ -81,6 +81,7 @@ const KNOWN_NODES = new Set([
   AST_NODE_TYPES.TSTypeParameterInstantiation,
   AST_NODE_TYPES.TSTypeReference,
   AST_NODE_TYPES.TSUnionType,
+  AST_NODE_TYPES.Decorator,
 ]);
 
 export default util.createRule<Options, MessageIds>({
diff --git a/packages/eslint-plugin/tests/rules/indent/indent.test.ts b/packages/eslint-plugin/tests/rules/indent/indent.test.ts
index 9fb9ef7dadd..f49be833005 100644
--- a/packages/eslint-plugin/tests/rules/indent/indent.test.ts
+++ b/packages/eslint-plugin/tests/rules/indent/indent.test.ts
@@ -1717,5 +1717,26 @@ declare module "Validation" {
         },
       ],
     },
+    {
+      code: `
+    @Decorator()
+class Foo {}
+            `,
+      output: `
+@Decorator()
+class Foo {}
+            `,
+      errors: [
+        {
+          messageId: 'wrongIndentation',
+          data: {
+            expected: '0 spaces',
+            actual: 4,
+          },
+          line: 2,
+          column: 1,
+        },
+      ],
+    },
   ],
 });