diff --git a/zebra/redistribute_null.c b/zebra/redistribute_null.c
index e57a73b..54198c8 100644
--- a/zebra/redistribute_null.c
+++ b/zebra/redistribute_null.c
@@ -6,21 +6,50 @@
 
 void zebra_redistribute_add (int a, struct zserv *b, int c)
 { return; }
+#ifdef HAVE_SYS_WEAK_ALIAS_PRAGMA
 #pragma weak zebra_redistribute_delete = zebra_redistribute_add
 #pragma weak zebra_redistribute_default_add = zebra_redistribute_add
 #pragma weak zebra_redistribute_default_delete = zebra_redistribute_add
+#else
+void zebra_redistribute_delete  (int a, struct zserv *b, int c)
+{ return; }
+void zebra_redistribute_default_add (int a, struct zserv *b, int c)
+{ return; }
+void zebra_redistribute_default_delete (int a, struct zserv *b, int c)
+{ return; }
+#endif
 
 void redistribute_add (struct prefix *a, struct rib *b)
 { return; }
+#ifdef HAVE_SYS_WEAK_ALIAS_PRAGMA
 #pragma weak redistribute_delete = redistribute_add
+#else
+void redistribute_delete (struct prefix *a, struct rib *b)
+{ return; }
+#endif
 
 void zebra_interface_up_update (struct interface *a)
 { return; }
+#ifdef HAVE_SYS_WEAK_ALIAS_PRAGMA
 #pragma weak zebra_interface_down_update = zebra_interface_up_update
 #pragma weak zebra_interface_add_update = zebra_interface_up_update
 #pragma weak zebra_interface_delete_update = zebra_interface_up_update
+#else
+void zebra_interface_down_update  (struct interface *a)
+{ return; }
+void zebra_interface_add_update (struct interface *a)
+{ return; }
+void zebra_interface_delete_update (struct interface *a)
+{ return; }
+#endif
 
 void zebra_interface_address_add_update (struct interface *a,
 					 	struct connected *b)
 { return; }
+#ifdef HAVE_SYS_WEAK_ALIAS_PRAGMA
 #pragma weak zebra_interface_address_delete_update = zebra_interface_address_add_update
+#else
+void zebra_interface_address_delete_update (struct interface *a,
+                                                struct connected *b)
+{ return; }
+#endif