diff --git a/fpm.toml b/fpm.toml
index 8f26ac92..621808ce 100644
--- a/fpm.toml
+++ b/fpm.toml
@@ -8,6 +8,8 @@ homepage = "https://github.com/szaghi/VecFor"
 
 [library]
 source-dir = "src/lib"
+include-dir = "src/lib"
+
 
 [install]
 library = true