diff --git a/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.log.expected b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.log.expected
new file mode 100644
index 00000000000..c36a7c11434
--- /dev/null
+++ b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.log.expected
@@ -0,0 +1,13 @@
+OUT:
+Buildfile: [TestData]/build.xml
+
+build:
+    [mkdir] Created dir: [Temp]/lib
+[kotlin2js] Compiling [[TestData]/jslib-example] => [[Temp]/lib/jslib-example.js]
+[kotlin2js] Compiling [[TestData]/root1] => [[Temp]/out.js]
+     [copy] Copying 2 files to [Temp]
+
+BUILD SUCCESSFUL
+Total time: [time]
+
+Return code: 0
diff --git a/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.xml b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.xml
new file mode 100644
index 00000000000..7c158229d52
--- /dev/null
+++ b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/build.xml
@@ -0,0 +1,22 @@
+<project name="Ant Task Test" default="build">
+  <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>
+  <property name="library.path" value="${test.data}/jslib-example"/>
+  <property name="temp.library.path" value="${temp}/lib"/>
+  <target name="build">
+    <mkdir dir="${temp.library.path}"/>
+
+    <kotlin2js src="${library.path}" output="${temp.library.path}/jslib-example.js" metaInfo="${temp.library.path}/jslib-example.meta.js"/>
+
+    <kotlin2js src="${test.data}/root1" output="${temp}/out.js" main="call">
+      <library>
+        <pathelement path="${temp.library.path}/jslib-example.meta.js"/>
+      </library>
+    </kotlin2js>
+    <copy todir="${temp}">
+      <fileset dir="${temp.library.path}">
+        <include name="**/*.js"/>
+        <exclude name="META-INF/**"/>
+      </fileset>
+    </copy>
+  </target>
+</project>
diff --git a/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/jslib-example/LibraryExample.kt b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/jslib-example/LibraryExample.kt
new file mode 100644
index 00000000000..f77e26551f9
--- /dev/null
+++ b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/jslib-example/LibraryExample.kt
@@ -0,0 +1,9 @@
+package library.sample
+
+import kotlin.js.Date
+
+public class ClassA() {
+    val value: Int = 100
+}
+
+public fun Date.extFun(): Int = 100
\ No newline at end of file
diff --git a/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/root1/foo.kt b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/root1/foo.kt
new file mode 100644
index 00000000000..743fab365aa
--- /dev/null
+++ b/compiler/testData/integration/ant/js/simpleWithStdlibAndJsFileAsAnotherLib/root1/foo.kt
@@ -0,0 +1,17 @@
+package foo
+
+import library.sample.*
+import kotlin.js.Date
+
+var ok = "FAIL"
+
+fun main(args: Array<String>) {
+    val x = ClassA().value
+    if (x == 100) {
+        ok = "OK"
+    }
+    val date = Date()
+    println(date.extFun())
+}
+
+fun box(): String = ok
diff --git a/compiler/tests/org/jetbrains/kotlin/integration/AntTaskJsTest.java b/compiler/tests/org/jetbrains/kotlin/integration/AntTaskJsTest.java
index 3fc713efb0d..30e51abf007 100644
--- a/compiler/tests/org/jetbrains/kotlin/integration/AntTaskJsTest.java
+++ b/compiler/tests/org/jetbrains/kotlin/integration/AntTaskJsTest.java
@@ -122,6 +122,11 @@ public class AntTaskJsTest extends AntTaskBaseTest {
         doJsAntTest("jslib-example.js");
     }
 
+    @Test
+    public void simpleWithStdlibAndJsFileAsAnotherLib() throws Exception {
+        doJsAntTest("jslib-example.js");
+    }
+
     @Test
     public void simpleWithMainFQArgs() throws Exception {
         doJsAntTest();
diff --git a/libraries/examples/browser-example-with-library/src/main/kotlin/sample/Hello.kt b/libraries/examples/browser-example-with-library/src/main/kotlin/sample/Hello.kt
index c6b0cb65485..6426f005a2f 100644
--- a/libraries/examples/browser-example-with-library/src/main/kotlin/sample/Hello.kt
+++ b/libraries/examples/browser-example-with-library/src/main/kotlin/sample/Hello.kt
@@ -3,6 +3,7 @@ package sample
 import kotlin.Pair
 import kotlin.browser.document
 import library.sample.*
+import kotlin.js.Date
 
 fun myApp() {
     val element = document.getElementById("foo")
@@ -11,6 +12,7 @@ fun myApp() {
         val x = pairAdd(p)
         val y = pairMul(p)
         val z = IntHolder(100).value
-        element.appendChild(document.createTextNode("x=$x y=$y z=$z")!!)
+        val u = Date().extFun()
+        element.appendChild(document.createTextNode("x=$x y=$y z=$z u=$u")!!)
     }
 }
diff --git a/libraries/examples/browser-example-with-library/src/test/kotlin/sample/SampleTest.kt b/libraries/examples/browser-example-with-library/src/test/kotlin/sample/SampleTest.kt
index 4cb5a451d97..756573911a2 100644
--- a/libraries/examples/browser-example-with-library/src/test/kotlin/sample/SampleTest.kt
+++ b/libraries/examples/browser-example-with-library/src/test/kotlin/sample/SampleTest.kt
@@ -17,6 +17,6 @@ open class SampleTest {
         val foo = driver.findElement(By.id("foo"))!!
         val text = foo.getText() ?: ""
         println("Found $foo with text '$text'")
-        assertEquals("x=30 y=200 z=100", text.trim())
+        assertEquals("x=30 y=200 z=100 u=1000", text.trim())
     }
 }
\ No newline at end of file
diff --git a/libraries/examples/kotlin-js-library-example/src/main/kotlin/sample/Main.kt b/libraries/examples/kotlin-js-library-example/src/main/kotlin/sample/Main.kt
index 28569346084..af97787d5c9 100644
--- a/libraries/examples/kotlin-js-library-example/src/main/kotlin/sample/Main.kt
+++ b/libraries/examples/kotlin-js-library-example/src/main/kotlin/sample/Main.kt
@@ -1,8 +1,11 @@
 package library.sample
 
+import kotlin.js.Date
+
 public fun pairAdd(p: Pair<Int, Int>): Int = p.first + p.second
 
 public fun pairMul(p: Pair<Int, Int>): Int = p.first * p.second
 
 public data class IntHolder(val value: Int)
 
+public fun Date.extFun(): Int = 1000
\ No newline at end of file