diff --git a/include/libbb.h b/include/libbb.h
index 5551031..31d9b74 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -58,6 +58,9 @@
 #ifdef DMALLOC
 # include <dmalloc.h>
 #endif
+#ifndef HAVE_XTABS
+# define XTABS TAB3
+#endif
 #include <pwd.h>
 #include <grp.h>
 #if ENABLE_FEATURE_SHADOWPASSWDS
diff --git a/include/platform.h b/include/platform.h
index bbbc0a9..73bd59a 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -256,9 +256,12 @@ typedef uint32_t bb__aliased_uint32_t FIX_ALIASING;
 # undef HAVE_MNTENT_H
 # undef HAVE_SYS_STATFS_H
 # undef HAVE_SIGHANDLER_T
+# undef HAVE_XTABS
+# undef HAVE_FDPRINTF
 #else
 # define HAVE_MNTENT_H 1
 # define HAVE_SYS_STATFS_H 1
+# define HAVE_XTABS 1
 #endif
 
 /*----- Kernel versioning ------------------------------------*/