diff --git a/gnu/usr.bin/gdb/libgdb/fbsd-threads.c b/gnu/usr.bin/gdb/libgdb/fbsd-threads.c
index e9f83a90d566..b88b73f1f248 100644
--- a/gnu/usr.bin/gdb/libgdb/fbsd-threads.c
+++ b/gnu/usr.bin/gdb/libgdb/fbsd-threads.c
@@ -1685,3 +1685,17 @@ ps_lcontinue(struct ps_prochandle *ph, lwpid_t lwpid)
     return PS_ERR;
   return PS_OK;   
 }
+
+ps_err_e
+ps_linfo(struct ps_prochandle *ph, lwpid_t lwpid, void *info)
+{
+  if (fbsd_thread_core) {
+    /* XXX should verify lwpid and make a pseudo lwp info */
+    memset(info, 0, sizeof(struct ptrace_lwpinfo));
+    return PS_OK;
+  }
+
+  if (ptrace (PT_LWPINFO, lwpid, info, sizeof(struct ptrace_lwpinfo)) == -1)
+    return PS_ERR;
+  return PS_OK;
+}
diff --git a/include/proc_service.h b/include/proc_service.h
index 0299b959df88..c9e6f27b4ef7 100644
--- a/include/proc_service.h
+++ b/include/proc_service.h
@@ -56,6 +56,7 @@ ps_err_e ps_lgetxmmregs (struct ps_prochandle *, lwpid_t, char *);
 ps_err_e ps_lsetxmmregs (struct ps_prochandle *, lwpid_t, const char *);
 #endif
 ps_err_e ps_lstop(struct ps_prochandle *, lwpid_t);
+ps_err_e ps_linfo(struct ps_prochandle *, lwpid_t, void *);
 ps_err_e ps_pcontinue(struct ps_prochandle *);
 ps_err_e ps_pdmodel(struct ps_prochandle *, int *);
 ps_err_e ps_pglobal_lookup(struct ps_prochandle *, const char *, const char *,