diff --git a/xconv.h b/xconv.h
index 43e258e..c80b13f 100644
--- a/xconv.h
+++ b/xconv.h
@@ -1,7 +1,7 @@
-
 #ifndef _XCONV_H
 
+#define _XCONV_H
+
 size_t xconv(char *, char *, size_t);
 
 #endif
-