diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemNode.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemNode.java
index 018031819efd..66fbd5804c97 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemNode.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemNode.java
@@ -35,7 +35,7 @@ import java.util.function.Function;
 /**
  * @author Vladislav.Soroka
  */
-public abstract class ExternalSystemNode<T> extends SimpleNode implements Comparable<ExternalSystemNode<T>> {
+public abstract class ExternalSystemNode<T> extends SimpleNode implements Comparable<ExternalSystemNode<?>> {
 
   static final int BUILTIN_TASKS_DATA_NODE_ORDER = 10;
   static final int BUILTIN_DEPENDENCIES_DATA_NODE_ORDER = BUILTIN_TASKS_DATA_NODE_ORDER + 10;
@@ -407,7 +407,7 @@ public abstract class ExternalSystemNode<T> extends SimpleNode implements Compar
   }
 
   @Override
-  public int compareTo(@NotNull ExternalSystemNode node) {
+  public int compareTo(@NotNull ExternalSystemNode<?> node) {
     return StringUtil.compare(this.getName(), node.getName(), true);
   }
 
diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemViewDefaultContributor.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemViewDefaultContributor.java
index 943c612742d7..77586d936fc5 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemViewDefaultContributor.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ExternalSystemViewDefaultContributor.java
@@ -422,7 +422,7 @@ final class ExternalSystemViewDefaultContributor extends ExternalSystemViewContr
     }
 
     @Override
-    public int compareTo(@NotNull ExternalSystemNode node) {
+    public int compareTo(@NotNull ExternalSystemNode<?> node) {
       final T myData = getData();
       final Object thatData = node.getData();
       if (myData instanceof OrderAware && thatData instanceof OrderAware) {
diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ModuleNode.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ModuleNode.java
index f247caf40ed7..5399ee57db9b 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ModuleNode.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/ModuleNode.java
@@ -80,7 +80,7 @@ public class ModuleNode extends ExternalSystemNode<ModuleData> {
   }
 
   @Override
-  public int compareTo(@NotNull ExternalSystemNode node) {
+  public int compareTo(@NotNull ExternalSystemNode<?> node) {
     return myIsRoot ? -1 : (node instanceof ModuleNode && ((ModuleNode)node).myIsRoot) ? 1 : super.compareTo(node);
   }
 
diff --git a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/TasksNode.java b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/TasksNode.java
index e41bc454e67d..b78606f34848 100644
--- a/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/TasksNode.java
+++ b/platform/external-system-impl/src/com/intellij/openapi/externalSystem/view/TasksNode.java
@@ -80,7 +80,7 @@ public class TasksNode extends ExternalSystemNode<Object> {
           }
 
           @Override
-          public int compareTo(@NotNull ExternalSystemNode node) {
+          public int compareTo(@NotNull ExternalSystemNode<?> node) {
             return "other".equals(group) ? 1 : super.compareTo(node);
           }
         };