diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8404b65c1ca..bf1c50f147d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -12,6 +12,7 @@ set(src
   flb_env.c
   flb_file.c
   flb_uri.c
+  flb_utf8.c
   flb_hash_table.c
   flb_help.c
   flb_pack.c