diff --git a/zen/gchange_MONITOR.sh b/zen/gchange_MONITOR.sh
index fc58e4f..4fb14c3 100755
--- a/zen/gchange_MONITOR.sh
+++ b/zen/gchange_MONITOR.sh
@@ -10,6 +10,8 @@
 MY_PATH="`dirname \"$0\"`"              # relative
 MY_PATH="`( cd \"$MY_PATH\" && pwd )`"  # absolutized and normalized
 
+mkdir ~/.zen/cache -p
+
 ipfsnodeid=$(ipfs id -f='<id>\n')
 [[ ! -f ~/.ssb/secret.dunikey ]] && $MY_PATH/tools/secret2dunikey.sh
 g1pub=$(cat ~/.ssb/secret.dunikey | grep 'pub:' | cut -d ' ' -f 2)