diff --git a/akpa_util.c b/akpa_util.c
index 0400277..2dbb9ed 100644
--- a/akpa_util.c
+++ b/akpa_util.c
@@ -1,6 +1,7 @@
 //
 // Created by akp on 06/10/23.
 //
+#pragma once
 
 int akpa_numcmp(int a, int b) {
     if (a < b) {
diff --git a/firewall_parser.c b/firewall_parser.c
index 4cb424c..259a95c 100644
--- a/firewall_parser.c
+++ b/firewall_parser.c
@@ -1,6 +1,8 @@
 //
 // Created by akp on 05/10/23.
 //
+#pragma once
+
 #include "firewall_types.c"
 #include <limits.h>
 #include <stdio.h>
diff --git a/firewall_types.c b/firewall_types.c
index ef7c373..d6c601a 100644
--- a/firewall_types.c
+++ b/firewall_types.c
@@ -1,6 +1,8 @@
 //
 // Created by akp on 06/10/23.
 //
+#pragma once
+
 #include "akpa_util.c"
 #include <stddef.h>
 #include <stdio.h>