diff --git a/libraries/stdlib/js/build.gradle b/libraries/stdlib/js/build.gradle
index ddf4bad9b43..93ba642662e 100644
--- a/libraries/stdlib/js/build.gradle
+++ b/libraries/stdlib/js/build.gradle
@@ -63,7 +63,7 @@ dependencies {
 
 idea {
     module {
-        excludeDirs = files('node_modules').toSet()
+        excludeDirs = excludeDirs + files('node_modules')
     }
 }