diff --git a/.cirrus.tasks.yml b/.cirrus.tasks.yml
index 77d0362a551..2a821593ce5 100644
--- a/.cirrus.tasks.yml
+++ b/.cirrus.tasks.yml
@@ -570,6 +570,7 @@ task:
         su postgres <<-EOF
           set -e
           export CC='ccache gcc -m32'
+          export CXX='ccache g++ -m32'
           meson setup \
             ${MESON_COMMON_PG_CONFIG_ARGS} \
             --buildtype=debug \