diff --git a/library/stdarch/ci/dox.sh b/library/stdarch/ci/dox.sh
index 461808dab28f..8a78230c13d0 100755
--- a/library/stdarch/ci/dox.sh
+++ b/library/stdarch/ci/dox.sh
@@ -15,6 +15,10 @@ dox() {
 
   echo documenting $arch
 
+  if [ "$CI" != "" ]; then
+    rustup target add $target || true
+  fi
+
   rm -rf target/doc/$arch
   mkdir target/doc/$arch