diff --git a/apps/ci/ci-compile.sh b/apps/ci/ci-compile.sh
index 2ac3b70d7..4058fb20e 100755
--- a/apps/ci/ci-compile.sh
+++ b/apps/ci/ci-compile.sh
@@ -5,6 +5,7 @@ set -e
 echo "compile core"
 export CCACHE_CPP2=true
 export CCACHE_MAXSIZE='500MB'
+export CCACHE_COMPRESS=1
 ccache -s
 ./acore.sh "compiler" "all"
 ccache -s