diff --git a/ldap/c-sdk/liblber/lber-int.h b/ldap/c-sdk/liblber/lber-int.h
index 24b15bdc5f..e9efba345c 100644
--- a/ldap/c-sdk/liblber/lber-int.h
+++ b/ldap/c-sdk/liblber/lber-int.h
@@ -85,7 +85,7 @@ extern "C" {
 /* #  include <sys/varargs.h> */
 #  include <sys/socket.h>
 #  include <netinet/in.h>
-#if !defined(XP_OS2) && !defined(DARWIN)
+#if !defined(XP_OS2)
 #  include <unistd.h>
 #endif
 # endif /* defined( _WINDOWS ) */