diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 0aca5a0eed1..e9a6239f752 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -6,6 +6,7 @@
     <excludeFromCompile>
       <directory url="file://$PROJECT_DIR$/core/reflection.jvm" includeSubdirectories="true" />
       <directory url="file://$PROJECT_DIR$/core/runtime.jvm" includeSubdirectories="true" />
+      <directory url="file://$PROJECT_DIR$/core/builtins" includeSubdirectories="true" />
     </excludeFromCompile>
     <resourceExtensions />
     <wildcardResourcePatterns>