diff --git a/deon-unix/linked_list/linked_list.h b/deon-unix/linked_list/linked_list.h
index 4260885..adb8467 100644
--- a/deon-unix/linked_list/linked_list.h
+++ b/deon-unix/linked_list/linked_list.h
@@ -2,8 +2,8 @@
 #define LINKED_LIST_H
 #include "../types.h"
 
-void free_linked_list(node_info *p_list);
-node_info *copy_linked_list(node_info *p_list);
-void linked_list_append(node_info* p_head, node_info* new_node);
-bool linked_list_remove(node_info* p_head, node_info* delete_node);
+static void free_linked_list(node_info *p_list);
+static node_info *copy_linked_list(node_info *p_list);
+static void linked_list_append(node_info* p_head, node_info* new_node);
+static bool linked_list_remove(node_info* p_head, node_info* delete_node);
 #endif