diff --git a/lib/core/index.js b/lib/core/index.js
index 1502a2b..c2322ea 100755
--- a/lib/core/index.js
+++ b/lib/core/index.js
@@ -9,7 +9,7 @@ import gonzales from './gonzales';
 import type { JsNode, gASTNode } from '../types';
 
 import {
-  getRegularClassesMap,
+  getRegularClassesAndIdsMap,
   getComposesClassesMap,
   getExtendClassesMap,
   getParentSelectorClassesMap,
@@ -150,13 +150,13 @@ export const getStyleClasses = (ast: gASTNode): ?Object => {
    */
   eliminateGlobals(ast);
 
-  const classesMap = getRegularClassesMap(ast);
+  const classesAndIdsMap = getRegularClassesAndIdsMap(ast);
   const composedClassesMap = getComposesClassesMap(ast);
   const extendClassesMap = getExtendClassesMap(ast);
   const parentSelectorClassesMap = getParentSelectorClassesMap(ast);
 
   return {
-    ...classesMap,
+    ...classesAndIdsMap,
     ...composedClassesMap,
     ...extendClassesMap,
     ...parentSelectorClassesMap
diff --git a/lib/core/traversalUtils.js b/lib/core/traversalUtils.js
index d3a657f..b97564c 100644
--- a/lib/core/traversalUtils.js
+++ b/lib/core/traversalUtils.js
@@ -39,7 +39,7 @@ export const getICSSExportPropsMap = (ast: gASTNode): classMapType => {
   )(ruleSets);
 };
 
-export const getRegularClassesMap = (ast: gASTNode): classMapType => {
+export const getRegularClassesAndIdsMap = (ast: gASTNode): classMapType => {
   const ruleSets: Array<gASTNode> = [];
   ast.traverseByType('ruleset', node => ruleSets.push(node));
 
@@ -51,7 +51,7 @@ export const getRegularClassesMap = (ast: gASTNode): classMapType => {
     fp.map('content'),
     fp.filter({ type: 'ident' }),
     fp.flatMap('content'),
-    fp.filter({ type: 'class' }),
+    fp.filter(node => node.is('class') || node.is('id')),
     fp.flatMap('content'),
     fp.filter({ type: 'selector' }),
     fp.flatMap('content'),
diff --git a/test/files/id.scss b/test/files/id.scss
new file mode 100644
index 0000000..80b78d8
--- /dev/null
+++ b/test/files/id.scss
@@ -0,0 +1,3 @@
+#scopedId {
+  color: red;
+}
\ No newline at end of file
diff --git a/test/lib/rules/no-undef-class.js b/test/lib/rules/no-undef-class.js
index ae455f1..1ae838b 100644
--- a/test/lib/rules/no-undef-class.js
+++ b/test/lib/rules/no-undef-class.js
@@ -355,6 +355,19 @@ ruleTester.run('no-undef-class', rule, {
       `,
       options: [{ camelCase: 'dashes-only' }],
     }),
+
+    /*
+      support id selectors
+    */
+    test({
+      code: `
+        import s from './id.scss';
+
+        export default Foo = () => (
+          <div id={s.scopedId}></div>
+        );
+      `,
+    }),
   ],
   /*
      invalid cases
@@ -656,5 +669,20 @@ ruleTester.run('no-undef-class', rule, {
         'Class or exported property \'foo-baz\' not found',
       ],
     }),
+    /*
+      support id selectors
+    */
+    test({
+      code: `
+        import s from './id.scss';
+
+        export default Foo = () => (
+          <div id={s.badScopedId}></div>
+        );
+      `,
+      errors: [
+        'Class or exported property \'badScopedId\' not found',
+      ],
+    }),
   ],
 });
diff --git a/test/lib/rules/no-unused-class.js b/test/lib/rules/no-unused-class.js
index d5c4bd8..f3f8074 100644
--- a/test/lib/rules/no-unused-class.js
+++ b/test/lib/rules/no-unused-class.js
@@ -222,6 +222,18 @@ ruleTester.run('no-unused-class', rule, {
       `,
       options: [{ camelCase: 'dashes-only' }],
     }),
+    /*
+      support id selectors
+    */
+    test({
+      code: `
+        import s from './id.scss';
+
+        export default Foo = () => (
+          <div id={s.scopedId}></div>
+        );
+      `,
+    }),
   ],
   /*
      invalid cases
@@ -419,5 +431,20 @@ ruleTester.run('no-unused-class', rule, {
         'Unused classes found in noUnusedClass3.scss: foo-bar, alreadyCamelCased, snake_cased',
       ],
     }),
+    /*
+      support id selectors
+    */
+    test({
+      code: `
+        import s from './id.scss';
+
+        export default Foo = () => (
+          <div>Not using s.scopedId</div>
+        );
+      `,
+      errors: [
+        'Unused classes found in id.scss: scopedId',
+      ],
+    }),
   ],
 });