diff --git a/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.kt b/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.kt
new file mode 100644
index 00000000000..cfaff60056f
--- /dev/null
+++ b/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.kt
@@ -0,0 +1,29 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+// FILE: A.java
+import java.util.*
+
+@kotlin.jvm.PurelyImplements("")
+public class A<T> extends AbstractList<T> {
+    @Override
+    public T get(int index) {
+        return null;
+    }
+
+    @Override
+    public int size() {
+        return 0;
+    }
+
+    static A rawField = null;
+}
+
+// FILE: B.java
+import java.util.*
+
+@kotlin.jvm.PurelyImplements("[INVALID]")
+public class B<T> extends AbstractList<T> {}
+
+// FILE: main.kt
+val x = A<String>()
+val y = B<String>()
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.txt b/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.txt
new file mode 100644
index 00000000000..e9233a123d4
--- /dev/null
+++ b/compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.txt
@@ -0,0 +1,75 @@
+package
+
+internal val x: A<kotlin.String>
+internal val y: B<kotlin.String>
+
+kotlin.jvm.PurelyImplements(value = "") public open class A</*0*/ T : kotlin.Any!> : java.util.AbstractList<T!> {
+    public constructor A</*0*/ T : kotlin.Any!>()
+    protected/*protected and package*/ final override /*1*/ /*fake_override*/ var modCount: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun add(/*0*/ e: T!): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun add(/*0*/ index: kotlin.Int, /*1*/ element: T!): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun addAll(/*0*/ c: kotlin.Collection<T!>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun addAll(/*0*/ index: kotlin.Int, /*1*/ c: kotlin.Collection<T!>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun clear(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun contains(/*0*/ o: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun containsAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    java.lang.Override() public open override /*1*/ fun get(/*0*/ index: kotlin.Int): T!
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun indexOf(/*0*/ o: kotlin.Any?): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun isEmpty(): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun iterator(): kotlin.MutableIterator<T!>
+    public open override /*1*/ /*fake_override*/ fun lastIndexOf(/*0*/ o: kotlin.Any?): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun listIterator(): kotlin.MutableListIterator<T!>
+    public open override /*1*/ /*fake_override*/ fun listIterator(/*0*/ index: kotlin.Int): kotlin.MutableListIterator<T!>
+    invisible_fake open override /*1*/ /*fake_override*/ fun outOfBoundsMsg(/*0*/ p0: kotlin.Int): kotlin.String!
+    invisible_fake open override /*1*/ /*fake_override*/ fun rangeCheckForAdd(/*0*/ p0: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun remove(/*0*/ o: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun remove(/*0*/ index: kotlin.Int): T!
+    public open override /*1*/ /*fake_override*/ fun removeAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    protected/*protected and package*/ open override /*1*/ /*fake_override*/ fun removeRange(/*0*/ p0: kotlin.Int, /*1*/ p1: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun retainAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun set(/*0*/ index: kotlin.Int, /*1*/ element: T!): T!
+    java.lang.Override() public open override /*1*/ fun size(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun subList(/*0*/ fromIndex: kotlin.Int, /*1*/ toIndex: kotlin.Int): kotlin.MutableList<T!>
+    public open override /*1*/ /*fake_override*/ fun toArray(): kotlin.Array<(out) kotlin.Any!>!
+    public open override /*1*/ /*fake_override*/ fun </*0*/ T : kotlin.Any!> toArray(/*0*/ p0: kotlin.Array<(out) T!>!): kotlin.Array<(out) T!>!
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    // Static members
+    public/*package*/ final var rawField: (A<kotlin.Any!>..A<*>?)
+}
+
+kotlin.jvm.PurelyImplements(value = "[INVALID]") public open class B</*0*/ T : kotlin.Any!> : java.util.AbstractList<T!> {
+    public constructor B</*0*/ T : kotlin.Any!>()
+    protected/*protected and package*/ final override /*1*/ /*fake_override*/ var modCount: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun add(/*0*/ e: T!): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun add(/*0*/ index: kotlin.Int, /*1*/ element: T!): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun addAll(/*0*/ c: kotlin.Collection<T!>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun addAll(/*0*/ index: kotlin.Int, /*1*/ c: kotlin.Collection<T!>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun clear(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun contains(/*0*/ o: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun containsAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract override /*1*/ /*fake_override*/ fun get(/*0*/ index: kotlin.Int): T!
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun indexOf(/*0*/ o: kotlin.Any?): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun isEmpty(): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun iterator(): kotlin.MutableIterator<T!>
+    public open override /*1*/ /*fake_override*/ fun lastIndexOf(/*0*/ o: kotlin.Any?): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun listIterator(): kotlin.MutableListIterator<T!>
+    public open override /*1*/ /*fake_override*/ fun listIterator(/*0*/ index: kotlin.Int): kotlin.MutableListIterator<T!>
+    invisible_fake open override /*1*/ /*fake_override*/ fun outOfBoundsMsg(/*0*/ p0: kotlin.Int): kotlin.String!
+    invisible_fake open override /*1*/ /*fake_override*/ fun rangeCheckForAdd(/*0*/ p0: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun remove(/*0*/ o: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun remove(/*0*/ index: kotlin.Int): T!
+    public open override /*1*/ /*fake_override*/ fun removeAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    protected/*protected and package*/ open override /*1*/ /*fake_override*/ fun removeRange(/*0*/ p0: kotlin.Int, /*1*/ p1: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun retainAll(/*0*/ c: kotlin.Collection<kotlin.Any?>): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun set(/*0*/ index: kotlin.Int, /*1*/ element: T!): T!
+    public abstract override /*1*/ /*fake_override*/ fun size(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun subList(/*0*/ fromIndex: kotlin.Int, /*1*/ toIndex: kotlin.Int): kotlin.MutableList<T!>
+    public open override /*1*/ /*fake_override*/ fun toArray(): kotlin.Array<(out) kotlin.Any!>!
+    public open override /*1*/ /*fake_override*/ fun </*0*/ T : kotlin.Any!> toArray(/*0*/ p0: kotlin.Array<(out) T!>!): kotlin.Array<(out) T!>!
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestWithStdLibGenerated.java b/compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestWithStdLibGenerated.java
index db1e5b9663c..29e922cebd7 100644
--- a/compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestWithStdLibGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestWithStdLibGenerated.java
@@ -667,6 +667,12 @@ public class JetDiagnosticsTestWithStdLibGenerated extends AbstractJetDiagnostic
             doTest(fileName);
         }
 
+        @TestMetadata("invalidFqName.kt")
+        public void testInvalidFqName() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/invalidFqName.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("maps.kt")
         public void testMaps() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithStdLib/purelyImplementedCollection/maps.kt");
diff --git a/core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt b/core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt
index d8c4decaada..b3ef57e12a4 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt
+++ b/core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt
@@ -158,7 +158,7 @@ class LazyJavaClassDescriptor(
                                           ?: FakePureImplementationsProvider.getPurelyImplementedInterface(fqName)
                                           ?: return null
 
-            if (purelyImplementedFqName.parent() != KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME) return null
+            if (purelyImplementedFqName.isRoot || purelyImplementedFqName.parent() != KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME) return null
 
             val classDescriptor = c.module.builtIns.getBuiltInClassByNameNullable(purelyImplementedFqName.shortName()) ?: return null