diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/vfilefinder/fileIndexes.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/vfilefinder/fileIndexes.kt
index 4ed9782ccc0..ccf05abf2d3 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/vfilefinder/fileIndexes.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/vfilefinder/fileIndexes.kt
@@ -50,7 +50,8 @@ abstract class KotlinFileIndexBase<T>(private val classOfIndex: Class<T>) : Scal
     override fun getKeyDescriptor() = KEY_DESCRIPTOR
 
     protected fun indexer(f: (FileContent) -> FqName?): DataIndexer<FqName, Void, FileContent> =
-            DataIndexer {
+            // See KT-11323
+            DataIndexer<FqName, Void, FileContent> {
                 try {
                     val fqName = f(it)
                     if (fqName != null) {