diff --git a/java/java-impl/src/com/intellij/codeInspection/magicConstant/MagicConstantInspection.java b/java/java-impl/src/com/intellij/codeInspection/magicConstant/MagicConstantInspection.java
index fbad6d7d2fe1..59ef31f21a4c 100644
--- a/java/java-impl/src/com/intellij/codeInspection/magicConstant/MagicConstantInspection.java
+++ b/java/java-impl/src/com/intellij/codeInspection/magicConstant/MagicConstantInspection.java
@@ -7,6 +7,9 @@ import com.intellij.codeInsight.ExternalAnnotationsManager;
 import com.intellij.codeInsight.daemon.GroupNames;
 import com.intellij.codeInspection.*;
 import com.intellij.ide.util.treeView.AbstractTreeNode;
+import com.intellij.openapi.progress.ProgressIndicator;
+import com.intellij.openapi.progress.ProgressManager;
+import com.intellij.openapi.progress.util.ProgressIndicatorBase;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.projectRoots.SdkModificator;
@@ -14,6 +17,7 @@ import com.intellij.openapi.projectRoots.impl.JavaSdkImpl;
 import com.intellij.openapi.roots.JdkUtils;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.Key;
+import com.intellij.openapi.util.Ref;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -765,7 +769,18 @@ public class MagicConstantInspection extends AbstractBaseJavaLocalInspectionTool
 
     SliceRootNode rootNode = new SliceRootNode(manager.getProject(), new DuplicateMap(), LanguageSlicing.getProvider(argument).createRootUsage(argument, params));
 
-    Collection<? extends AbstractTreeNode> children = rootNode.getChildren().iterator().next().getChildren();
+    ProgressIndicator indicator = new ProgressIndicatorBase();
+    indicator.start();
+
+    Ref<Collection<? extends AbstractTreeNode>> nodesRef = Ref.create();
+    try {
+      ProgressManager.getInstance().executeProcessUnderProgress(() -> nodesRef.set(rootNode.getChildren().iterator().next().getChildren()), indicator);
+    }
+    finally {
+      indicator.stop();
+    }
+
+    Collection<? extends AbstractTreeNode> children = nodesRef.get();
     for (AbstractTreeNode child : children) {
       SliceUsage usage = (SliceUsage)child.getValue();
       PsiElement element = usage != null ? usage.getElement() : null;