diff --git a/suites/hg/bin-env-setup/mercurial.poulpe-setup.sh b/suites/hg/bin-env-setup/mercurial.poulpe-setup.sh
index 96fbf00e277e78715edc49749229f191eb345095_c3VpdGVzL2hnL2Jpbi1lbnYtc2V0dXAvbWVyY3VyaWFsLnBvdWxwZS1zZXR1cC5zaA==..d193df389de811acd267a240c6f34044d676d5ab_c3VpdGVzL2hnL2Jpbi1lbnYtc2V0dXAvbWVyY3VyaWFsLnBvdWxwZS1zZXR1cC5zaA== 100755
--- a/suites/hg/bin-env-setup/mercurial.poulpe-setup.sh
+++ b/suites/hg/bin-env-setup/mercurial.poulpe-setup.sh
@@ -50,6 +50,7 @@
 hg clone ${repo_url} poulpe-tmp/mercurial/ \
     --noupdate \
     --config extensions.share= \
+    --config extensions.topic= \
     --config share.poolnaming=remote \
     --config share.pool=/tmp/poulpe-clone-cache/ \
     --config format.use-dirstate-v2=no \