diff --git a/tools/check-spelling.sh b/tools/check-spelling.sh
index d82a77b2e47c..5090352a726e 100755
--- a/tools/check-spelling.sh
+++ b/tools/check-spelling.sh
@@ -6,7 +6,7 @@ if git --no-pager grep -nHiE 'l[ightn]{6}g|l[ightn]{8}g|ilghtning|lgihtning|lihg
     exit 1
 fi
 
-if git --no-pager grep -nHiE 'ctlv' | grep -v 'enctlv' -- . ':!tools/check-spelling.sh'; then
+if git --no-pager grep -nHiEP '(?<!en)ctlv' -- . ':!tools/check-spelling.sh'; then
     echo "It's check lock time verify, not check time lock verify!" >&2
     exit 1
 fi