diff --git a/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt b/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
index d66c7c6e48fd..f100abd61596 100644
--- a/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
+++ b/platform/lang-impl/src/com/intellij/index/PrebuiltIndexAwareIdIndexer.kt
@@ -29,7 +29,7 @@ abstract class PrebuiltIndexAwareIdIndexer : PrebuiltIndexProviderBase<Map<IdInd
     return if (map != null) {
       if (PREBUILT_INDICES_DEBUG) {
         if (!map.equals(idIndexMap(inputData))) {
-          LOG.error("Prebuilt id index differs from actual value")
+          LOG.error("Prebuilt id index differs from actual value for ${inputData.file.path}")
         }
       }
       map