diff --git a/getethertype.c b/getethertype.c
index 4a75233..7adce53 100644
--- a/getethertype.c
+++ b/getethertype.c
@@ -32,7 +32,7 @@
 * Created at: Mon Nov 11 12:20:11 EET 2002
 ********************************************************************/
 
-
+#define __EXPORTED_HEADERS__
 #include <ctype.h>
 #include <features.h>
 #include <sys/types.h>