diff --git a/src/project.c b/src/project.c
index 9cc0254..eed7506 100644
--- a/src/project.c
+++ b/src/project.c
@@ -145,6 +145,7 @@ void project_reload(Project *project, void (*reload_callback)(unsigned int)) {
 void project_free(Project *project) {
   for (unsigned int i = 0; i < project->frag_count; i++) {
     file_free(&project->fragment_shaders[i][0]);
+    // other sub files contents are freed at parse_fragment_shader_file
   }
 
   config_file_free(&project->config);