diff --git a/include/dap_file_utils.h b/include/dap_file_utils.h
index 2a85b162d14890be91f3f06306e4fc4f5ad386c4..e4560ed7d2ec872d2677a420395b6c4f6d4b0f1d 100755
--- a/include/dap_file_utils.h
+++ b/include/dap_file_utils.h
@@ -87,6 +87,12 @@ char* dap_path_get_basename(const char *a_file_name);
 bool  dap_path_is_absolute(const char *a_file_name);
 char* dap_path_get_dirname(const char *a_file_name);
 
+/**
+ * Added function to define all subdirectories in a directory.
+ *
+ * @a_path_name directory path.
+ * @return dap_list_t type variable that contains a list of subdirectories.
+ */
 dap_list_t *dap_dir_get_subdirectory(const char *a_path_name);
 
 #endif // _FILE_UTILS_H_