diff --git a/ct/debian-v3.sh b/ct/debian-v3.sh
index 5c872b28..4003fd90 100644
--- a/ct/debian-v3.sh
+++ b/ct/debian-v3.sh
@@ -29,7 +29,7 @@ trap die ERR
 
 function error_exit() {
   trap - ERR
-  local reason="Unknown failure occured."
+  local reason="Unknown failure occurred."
   local msg="${1:-$reason}"
   local flag="${RD}‼ ERROR ${CL}$EXIT@$LINE"
   echo -e "$flag $msg" 1>&2