diff --git a/lib/Makefile.am b/lib/Makefile.am
index 1411221..64b9030 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -36,6 +36,11 @@
 SUBDIRS += js
 endif
 
+if WITH_KOTLIN
+SUBDIRS += kotlin
+PRECROSS_TARGET += precross-kotlin
+endif
+
 if WITH_PYTHON
 SUBDIRS += py
 endif