diff --git a/platform/lang-impl/src/com/intellij/index/PrebuiltIndex.kt b/platform/lang-impl/src/com/intellij/index/PrebuiltIndex.kt
index 93451aaa55c3..4c87559890df 100644
--- a/platform/lang-impl/src/com/intellij/index/PrebuiltIndex.kt
+++ b/platform/lang-impl/src/com/intellij/index/PrebuiltIndex.kt
@@ -10,6 +10,7 @@ import com.intellij.openapi.util.registry.Registry
 import com.intellij.psi.stubs.FileContentHashing
 import com.intellij.psi.stubs.HashCodeDescriptor
 import com.intellij.psi.stubs.PrebuiltStubsProviderBase
+import com.intellij.util.SystemProperties
 import com.intellij.util.indexing.FileContent
 import com.intellij.util.indexing.IndexInfrastructure
 import com.intellij.util.io.DataExternalizer
@@ -31,6 +32,9 @@ abstract class PrebuiltIndexProviderBase<Value> : Disposable {
 
   companion object {
     private val LOG = Logger.getInstance("#com.intellij.index.PrebuiltIndexProviderBase")
+
+    @JvmField
+    val DEBUG_PREBUILT_INDICES = SystemProperties.getBooleanProperty("debug.prebuilt.indices", false)
   }
 
   init {
diff --git a/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt b/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
index e469819a3c00..d4ace5ab61f2 100644
--- a/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
+++ b/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
@@ -5,7 +5,6 @@ import com.intellij.openapi.diagnostic.Logger
 import com.intellij.psi.impl.cache.impl.id.IdIndexEntry
 import com.intellij.psi.impl.cache.impl.id.LexingIdIndexer
 import com.intellij.util.indexing.FileContent
-import com.intellij.util.indexing.impl.DebugAssertions
 import com.intellij.util.io.DataExternalizer
 import com.intellij.util.io.DataInputOutputUtil
 import java.io.DataInput
@@ -28,7 +27,7 @@ abstract class PrebuiltIndexAwareIdIndexer : PrebuiltIndexProviderBase<Map<IdInd
   override fun map(inputData: FileContent): Map<IdIndexEntry, Int> {
     val map = get(inputData)
     return if (map != null) {
-      if (DebugAssertions.DEBUG) {
+      if (DEBUG_PREBUILT_INDICES) {
         if (map != idIndexMap(inputData)) {
           LOG.error("Prebuilt id index differs from actual value for ${inputData.file.path}")
         }
diff --git a/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java b/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
index 8c8340774ab6..6dc4ce48706f 100644
--- a/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
+++ b/platform/lang-impl/src/com/intellij/psi/stubs/StubUpdatingIndex.java
@@ -15,6 +15,7 @@
  */
 package com.intellij.psi.stubs;
 
+import com.intellij.index.PrebuiltIndexProviderBase;
 import com.intellij.lang.Language;
 import com.intellij.lang.LanguageParserDefinitions;
 import com.intellij.lang.ParserDefinition;
@@ -217,7 +218,7 @@ public class StubUpdatingIndex extends CustomImplementationFileBasedIndexExtensi
               PrebuiltStubsProviders.INSTANCE.forFileType(inputData.getFileType());
             if (prebuiltStubsProvider != null) {
               rootStub = prebuiltStubsProvider.findStub(inputData);
-              if (DebugAssertions.DEBUG) {
+              if (PrebuiltIndexProviderBase.DEBUG_PREBUILT_INDICES) {
                 Stub stub = StubTreeBuilder.buildStubTree(inputData);
                 if (rootStub != null && stub != null) {
                   check(rootStub, stub);