diff --git a/spcd/main.sh b/spcd/main.sh
index 342f804..cb95842 100644
--- a/spcd/main.sh
+++ b/spcd/main.sh
@@ -874,7 +874,7 @@ spcd_step() {
     if [ -n "${1}" ]; then
         spcd_step__prefix="SPCD_STEP_${SPCD_STEP_LEVEL}"
         spcd_step__index="${spcd_step__prefix}_INDEX"
-        eval "${spcd_step__index}=$((${spcd_step__index} + 1))"
+        eval "${spcd_step__index}=\$((${spcd_step__index} + 1))"
         eval "${spcd_step__prefix}_LABEL=\"${1}\""
         spcd_banner
     fi