diff --git a/plugins/available/cmd-duration.plugin.bash b/plugins/available/cmd-duration.plugin.bash
index fb8c0e12..fd10f1d2 100644
--- a/plugins/available/cmd-duration.plugin.bash
+++ b/plugins/available/cmd-duration.plugin.bash
@@ -19,7 +19,7 @@ _command_duration_pre_exec() {
     date +%s > "$COMMAND_DURATION_FILE"
 }
 
-function _command_duration {
+_command_duration() {
     local command_duration command_start current_time
     current_time=$(date +%s)