diff --git a/scripts/harb-evaluator/red-team.sh b/scripts/harb-evaluator/red-team.sh
index 2358879..645fc56 100755
--- a/scripts/harb-evaluator/red-team.sh
+++ b/scripts/harb-evaluator/red-team.sh
@@ -747,12 +747,12 @@ log "  lm_eth_after  : $LM_ETH_AFTER wei"
 log ""
 
 BROKE=false
-if python3 -c "import sys; sys.exit(0 if int('$LM_ETH_AFTER') < int('$LM_ETH_BEFORE') else 1)"; then
+if python3 -c "import sys; sys.exit(0 if int('${LM_ETH_AFTER:-0}') < int('${LM_ETH_BEFORE:-0}') else 1)"; then
   BROKE=true
 fi
 
 if [[ "$BROKE" == "true" ]]; then
-  DELTA=$(python3 -c "print($LM_ETH_BEFORE - $LM_ETH_AFTER)")
+  DELTA=$(python3 -c "print(int('${LM_ETH_BEFORE:-0}') - int('${LM_ETH_AFTER:-0}'))")
   log "  RESULT: ETH EXTRACTED ❌"
   log "  Decrease: $DELTA wei"
   log ""