diff --git a/config.h b/config.h
index 8ddcbf4..e0fa918 100644
--- a/config.h
+++ b/config.h
@@ -1,3 +1,5 @@
+#ifndef KERNEL_CONFIG_H
+#define KERNEL_CONFIG_H
 /*
  * Number of CPU's For now, this is hard-coded here. It will likely be
  * dynamically discovered in the future.
@@ -6,3 +8,4 @@
 
 /* Maximum number of files open */
 #define NOFILE 10
+#endif // KERNEL_CONFIG_H