diff --git a/idea/testData/editor/optimizeImports/KT13766.kt b/idea/testData/editor/optimizeImports/KT13766.kt
new file mode 100644
index 00000000000..a25f759bc9c
--- /dev/null
+++ b/idea/testData/editor/optimizeImports/KT13766.kt
@@ -0,0 +1,22 @@
+import java.util.*
+
+class Outer {
+
+    private abstract class Base {
+
+        protected sealed class Sealed {
+            object OOO : Sealed()
+        }
+
+        typealias OOO = Sealed.OOO
+    }
+
+    private class Derived : Base() {
+
+        fun foo(): Sealed {
+            ArrayList<Int>()
+            return OOO
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/idea/testData/editor/optimizeImports/KT13766.kt.after b/idea/testData/editor/optimizeImports/KT13766.kt.after
new file mode 100644
index 00000000000..0aa6138df89
--- /dev/null
+++ b/idea/testData/editor/optimizeImports/KT13766.kt.after
@@ -0,0 +1,22 @@
+import java.util.ArrayList
+
+class Outer {
+
+    private abstract class Base {
+
+        protected sealed class Sealed {
+            object OOO : Sealed()
+        }
+
+        typealias OOO = Sealed.OOO
+    }
+
+    private class Derived : Base() {
+
+        fun foo(): Sealed {
+            ArrayList<Int>()
+            return OOO
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/idea/imports/OptimizeImportsTestGenerated.java b/idea/tests/org/jetbrains/kotlin/idea/imports/OptimizeImportsTestGenerated.java
index d76e707dfb4..c5a5aa0f2ef 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/imports/OptimizeImportsTestGenerated.java
+++ b/idea/tests/org/jetbrains/kotlin/idea/imports/OptimizeImportsTestGenerated.java
@@ -155,6 +155,12 @@ public class OptimizeImportsTestGenerated extends AbstractOptimizeImportsTest {
         doTest(fileName);
     }
 
+    @TestMetadata("KT13766.kt")
+    public void testKT13766() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/optimizeImports/KT13766.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("KT9875.kt")
     public void testKT9875() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/optimizeImports/KT9875.kt");