diff --git a/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt b/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
index b82b71faccf..d48acf2da61 100644
--- a/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
+++ b/java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
@@ -80,7 +80,7 @@ open class KotlinFileExtractor(
                 }
             }
 
-            file.declarations.map { extractDeclaration(it, extractPrivateMembers = true, extractFunctionBodies = true) }
+            file.declarations.forEach { extractDeclaration(it, extractPrivateMembers = true, extractFunctionBodies = true) }
             extractStaticInitializer(file, null)
             CommentExtractor(this, file, tw.fileId).extract()
         }