$OpenBSD$

Index: runtime/phobos/std/stdio.d
--- runtime/phobos/std/stdio.d.orig
+++ runtime/phobos/std/stdio.d
@@ -68,6 +68,12 @@ version (FreeBSD)
     version = HAS_GETDELIM;
 }
 
+version (OpenBSD)
+{
+    version = GENERIC_IO;
+    version = HAS_GETDELIM;
+}
+
 version (DragonFlyBSD)
 {
     version = GENERIC_IO;
