diff --git a/lib/bind/port_after.h.in b/lib/bind/port_after.h.in
index 067742a188..701ae1f1d6 100644
--- a/lib/bind/port_after.h.in
+++ b/lib/bind/port_after.h.in
@@ -110,4 +110,8 @@ int daemon(int nochdir, int noclose);
 char * strsep(char **stringp, const char *delim);
 #endif
 
+#ifndef ALIGN
+#define ALIGN(p) (((unsigned int)(p) + (sizeof(int) - 1)) & ~(sizeof(int) - 1))
+#endif
+
 #endif