diff --git a/libraries/stdlib/common/build.gradle b/libraries/stdlib/common/build.gradle
index 1fc59483143..d70a6c53009 100644
--- a/libraries/stdlib/common/build.gradle
+++ b/libraries/stdlib/common/build.gradle
@@ -15,7 +15,9 @@ sourceSets {
             srcDir 'src'
             srcDir commonSrcDir
             srcDir '../unsigned/src'
-            srcDir "$rootDir/core/builtins/src/kotlin/internal"
+            if(!BuildPropertiesKt.getKotlinBuildProperties(project).inIdeaSync) {
+                srcDir "$rootDir/core/builtins/src/kotlin/internal"
+            }
         }
     }
     test {