diff --git a/nilinkedlist.h b/nilinkedlist.h
index 1e460a4..092d498 100644
--- a/nilinkedlist.h
+++ b/nilinkedlist.h
@@ -1,7 +1,5 @@
 #include "../ni-arena/niarena.h"
 
-#define NILINKEDLIST_IMPLEMENTATION
-
 typedef struct _NILinkedListNode {
 	void *content;
 	struct _NILinkedListNode *next;