diff --git a/project.yml b/project.yml
index dac0d93..a360bc3 100644
--- a/project.yml
+++ b/project.yml
@@ -34,7 +34,7 @@
     - +:src/test/c/**
     - -:src/test/c/support
   :source:
-    - src/main/c/**
+    - +:src/main/c/**
   :support:
     - src/test/c/support
   :libraries: []
@@ -98,4 +98,3 @@
   :enabled:
     - stdout_pretty_tests_report
     - module_generator
-...