diff --git a/build-aux/hydra/gnu-system.scm b/build-aux/hydra/gnu-system.scm
index 17c224ea4e..53fa637f14 100644
--- a/build-aux/hydra/gnu-system.scm
+++ b/build-aux/hydra/gnu-system.scm
@@ -123,6 +123,7 @@ SYSTEM."
   '("mips64el-linux-gnu"
     "mips64el-linux-gnuabi64"
     "arm-linux-gnueabihf"
+    "aarch64-linux-gnu"
     "powerpc-linux-gnu"
     "i586-pc-gnu"                                 ;aka. GNU/Hurd
     "i686-w64-mingw32"))