diff --git a/get_next_line/include/get_next_line.h b/get_next_line/include/get_next_line.h
index dd05e2b..239db08 100644
--- a/get_next_line/include/get_next_line.h
+++ b/get_next_line/include/get_next_line.h
@@ -17,8 +17,8 @@
 # define DONE 0
 # define BUFFER_SIZE 10
 
-# ifdef OPEN_MAX
-#  define OPEN_MAX 256.
+# ifndef OPEN_MAX
+#  define OPEN_MAX 256
 # endif
 
 # include <stdlib.h>