diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt
index ef92f393435..5447fba6df6 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIntrinsics.kt
@@ -96,7 +96,7 @@ class JsIntrinsics(private val irBuiltIns: IrBuiltIns, val context: JsIrBackendC
     // Type checks:
 
     val jsInstanceOf = binOpBool("jsInstanceOf")
-    val jsTypeOf = unOp("jsTypeOf", irBuiltIns.stringType)
+    val jsTypeOf = getInternalFunction("jsTypeOf")
 
     // Number conversions:
 
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
index 1cdc1d47b22..f521ed0a533 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java
@@ -4649,6 +4649,24 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
         }
     }
 
+    @TestMetadata("js/js.translator/testData/box/intrinsics")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Intrinsics extends AbstractIrBoxJsTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest0(this::doTest, TargetBackend.JS_IR, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInIntrinsics() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/box/intrinsics"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS_IR, true);
+        }
+
+        @TestMetadata("typeof.kt")
+        public void testTypeof() throws Exception {
+            runTest("js/js.translator/testData/box/intrinsics/typeof.kt");
+        }
+    }
+
     @TestMetadata("js/js.translator/testData/box/java")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
index 0863dfbeec2..45f66e76caf 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java
@@ -4664,6 +4664,24 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
         }
     }
 
+    @TestMetadata("js/js.translator/testData/box/intrinsics")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Intrinsics extends AbstractBoxJsTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest0(this::doTest, TargetBackend.JS, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInIntrinsics() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("js/js.translator/testData/box/intrinsics"), Pattern.compile("^([^_](.+))\\.kt$"), null, TargetBackend.JS, true);
+        }
+
+        @TestMetadata("typeof.kt")
+        public void testTypeof() throws Exception {
+            runTest("js/js.translator/testData/box/intrinsics/typeof.kt");
+        }
+    }
+
     @TestMetadata("js/js.translator/testData/box/java")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
diff --git a/js/js.translator/testData/box/intrinsics/typeof.js b/js/js.translator/testData/box/intrinsics/typeof.js
new file mode 100644
index 00000000000..6802269e2d8
--- /dev/null
+++ b/js/js.translator/testData/box/intrinsics/typeof.js
@@ -0,0 +1 @@
+var definedVariableX = 10;
\ No newline at end of file
diff --git a/js/js.translator/testData/box/intrinsics/typeof.kt b/js/js.translator/testData/box/intrinsics/typeof.kt
new file mode 100644
index 00000000000..5af873d6db2
--- /dev/null
+++ b/js/js.translator/testData/box/intrinsics/typeof.kt
@@ -0,0 +1,12 @@
+// EXPECTED_REACHABLE_NODES: 1303
+external val definedVariableX: Int
+external val undefinedVariableX: Int
+
+fun box(): String {
+    if (jsTypeOf(definedVariableX) != "number") return "Fail 1"
+    if (jsTypeOf(js("definedVariableX")) != "number") return "Fail 2"
+    if (jsTypeOf(undefinedVariableX) != "undefined") return "Fail 3"
+    if (jsTypeOf(js("undefinedVariableX")) != "undefined") return "Fail 4"
+
+    return "OK"
+}
\ No newline at end of file