diff --git a/core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/EnumEntrySyntheticClassDescriptor.java b/core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/EnumEntrySyntheticClassDescriptor.java
index 72fae68fc08..b4bb2fde278 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/EnumEntrySyntheticClassDescriptor.java
+++ b/core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/EnumEntrySyntheticClassDescriptor.java
@@ -201,7 +201,8 @@ public class EnumEntrySyntheticClassDescriptor extends ClassDescriptorBase {
 
         @NotNull
         @Override
-        public Collection<PropertyDescriptor> getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
+        @SuppressWarnings({"unchecked"}) // KT-9898 Impossible implement kotlin interface in java
+        public Collection getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
             return properties.invoke(name);
         }
 
diff --git a/core/descriptors/src/org/jetbrains/kotlin/types/ErrorUtils.java b/core/descriptors/src/org/jetbrains/kotlin/types/ErrorUtils.java
index 4cc662fe35c..b1541882cbd 100644
--- a/core/descriptors/src/org/jetbrains/kotlin/types/ErrorUtils.java
+++ b/core/descriptors/src/org/jetbrains/kotlin/types/ErrorUtils.java
@@ -175,7 +175,8 @@ public class ErrorUtils {
 
         @NotNull
         @Override
-        public Set<PropertyDescriptor> getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
+        @SuppressWarnings({"unchecked"}) // KT-9898 Impossible implement kotlin interface in java
+        public Set getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
             return ERROR_PROPERTY_GROUP;
         }
 
@@ -236,7 +237,8 @@ public class ErrorUtils {
 
         @NotNull
         @Override
-        public Collection<PropertyDescriptor> getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
+        @SuppressWarnings({"unchecked"}) // KT-9898 Impossible implement kotlin interface from java
+        public Collection getContributedVariables(@NotNull Name name, @NotNull LookupLocation location) {
             throw new IllegalStateException();
         }