diff --git a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt
index 2951f654eb9..99f08de277d 100644
--- a/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt
+++ b/jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt
@@ -197,7 +197,7 @@ public class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR
             recompilationDecision = DO_NOTHING
         }
         else {
-            val generatedClasses = generatedFiles as List<GeneratedJvmClass>
+            val generatedClasses = generatedFiles.filterIsInstance<GeneratedJvmClass>()
             recompilationDecision = updateKotlinIncrementalCache(compilationErrors, incrementalCaches, generatedClasses)
             updateJavaMappings(chunk, compilationErrors, context, dirtyFilesHolder, filesToCompile, generatedClasses)
         }