diff --git a/libraries/stdlib/js/build.gradle b/libraries/stdlib/js/build.gradle
index a604c943fc7..e593c8033d0 100644
--- a/libraries/stdlib/js/build.gradle
+++ b/libraries/stdlib/js/build.gradle
@@ -50,6 +50,7 @@ sourceSets {
     }
 
     experimental {
+        if(!System.properties.'idea.active')
         kotlin {
             srcDir experimentalSrcDir
         }