diff --git a/autogen.sh b/autogen.sh
index de16260b563279..28e0e09d5d3c89 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -14,3 +14,15 @@ fi
 command -v autoreconf >/dev/null || \
   (echo "configuration failed, please install autoconf first" && exit 1)
 autoreconf --install --force --warnings=all
+
+# autoreconf / libtoolize may generate versions of config.guess and config.sub
+# that are too old to recognise some triplets, i.e arm64-apple-darwin20, so
+# copy over the generated config.guess & config.sub with updated versions.
+cp depends/config.guess build-aux/config.guess
+cp depends/config.sub build-aux/config.sub
+
+cp depends/config.guess src/secp256k1/build-aux/config.guess
+cp depends/config.sub src/secp256k1/build-aux/config.sub
+
+cp depends/config.guess src/univalue/build-aux/config.guess
+cp depends/config.sub src/univalue/build-aux/config.sub
\ No newline at end of file